value should be a regular expression; any recipients that match are
excluded from the @samp{CC} field. They are also excluded from the
@samp{To} field, unless this would leave the field empty. If this
-variable is nil, then the first time you compose a reply it is
+variable is @code{nil}, then the first time you compose a reply it is
initialized to a default value that matches your own address.
To omit the @samp{CC} field completely for a particular reply, enter
use for the summary window. The variable
@code{rmail-summary-line-count-flag} controls whether the summary line
for a message should include the line count of the message. Setting
-this option to nil might speed up the generation of summaries.
+this option to @code{nil} might speed up the generation of summaries.
@node Rmail Summary Edit
@subsection Editing in Summaries
making your programs hard to understand.
@item
-Calling a minor mode function from Lisp with a nil or omitted argument
+Calling a minor mode function from Lisp with a @code{nil} or omitted argument
does not enable the minor mode unconditionally; instead, it toggles
the minor mode---which is the straightforward thing to do, since that
is the behavior when invoked interactively. One downside is that it
@defun overlays-at pos &optional sorted
This function returns a list of all the overlays that cover the character at
-position @var{pos} in the current buffer. If @var{sorted} is non-nil, the list
-is in decreasing order of priority, otherwise it is in no particular order.
-An overlay contains position @var{pos} if it begins at or before @var{pos}, and
-ends after @var{pos}.
+position @var{pos} in the current buffer. If @var{sorted} is non-@code{nil},
+the list is in decreasing order of priority, otherwise it is in no particular
+order. An overlay contains position @var{pos} if it begins at or before
+@var{pos}, and ends after @var{pos}.
To illustrate usage, here is a Lisp function that returns a list of the
overlays that specify property @var{prop} for the character at point:
@item :key-sequence @var{keys}
@var{keys} is a hint for speeding up Emacs's first display of the
-menu. It should be nil if you know that the menu item has no keyboard
+menu. It should be @code{nil} if you know that the menu item has no keyboard
equivalent; otherwise it should be a string or vector specifying a
keyboard equivalent for the menu item.
@item :selected @var{selected}
@var{selected} is an expression; the checkbox or radio button is
-selected whenever the expression's value is non-nil.
+selected whenever the expression's value is non-@code{nil}.
@item :help @var{help}
@var{help} is a string describing the menu item.
retrieve the documentation strings of the major and minor mode
commands (@pxref{Accessing Documentation}).
-If called from Lisp with a non-nil @var{buffer} argument, this
+If called from Lisp with a non-@code{nil} @var{buffer} argument, this
function displays the documentation for that buffer's major and minor
modes, rather than those of the current buffer.
@end deffn
@end itemize
When @var{arg} is a token, the function is called with point just before
-that token. A return value of nil always means to fallback on the
-default behavior, so the function should return nil for arguments it
+that token. A return value of @code{nil} always means to fallback on the
+default behavior, so the function should return @code{nil} for arguments it
does not expect.
@var{offset} can be:
@itemize
@item
The first case indicates the basic indentation increment to use.
-If @code{sample-indent-basic} is nil, then SMIE uses the global
+If @code{sample-indent-basic} is @code{nil}, then SMIE uses the global
setting @code{smie-indent-basic}. The major mode could have set
@code{smie-indent-basic} buffer-locally instead, but that
is discouraged.
(add-hook 'suspend-resume-hook (lambda () (message "Resumed!")
(sit-for 2)))
@end smallexample
-@c The sit-for prevents the ``nil'' that suspend-emacs returns
+@c The sit-for prevents the @code{nil} that suspend-emacs returns
@c hiding the message.
Here is what you would see upon evaluating @code{(suspend-emacs "pwd")}:
@defun bool-vector-subsetp a b
Return @code{t} if every @code{t} value in @var{a} is also t in
-@var{b}, nil otherwise. All arguments should be bool vectors of the
+@var{b}, @code{nil} otherwise. All arguments should be bool vectors of the
same length.
@end defun
If this command acts on the entire buffer (i.e. if called
interactively with the mark inactive, or called from Lisp with
-@var{end} nil), it also deletes all trailing lines at the end of the
+@var{end} @code{nil}), it also deletes all trailing lines at the end of the
buffer if the variable @code{delete-trailing-lines} is non-@code{nil}.
@end deffn
(@pxref{Special Properties}), such as a face name or an anonymous face
(@pxref{Faces}).
-If any text in the region already has a non-nil @code{face} property,
+If any text in the region already has a non-@code{nil} @code{face} property,
those face(s) are retained. This function sets the @code{face}
property to a list of faces, with @var{face} as the first element (by
default) and the pre-existing faces as the remaining elements. If the
@noindent
Every character not part of the sub-formula @samp{b} has been changed
to a dot. (If the customizable variable
-@code{calc-highlight-selections-with-faces} is non-nil, then the characters
+@code{calc-highlight-selections-with-faces} is non-@code{nil}, then the characters
not part of the sub-formula are de-emphasized by using a less
noticeable face instead of using dots. @pxref{Displaying Selections}.)
The @samp{*} next to the line number is to remind you that
@end group
@end smallexample
If the customizable variable
-@code{calc-highlight-selections-with-faces} is non-nil, then the
+@code{calc-highlight-selections-with-faces} is non-@code{nil}, then the
non-selected portion of the formula will be de-emphasized by using a
less noticeable face (@code{calc-nonselected-face}) instead of dots
and the selected sub-formula will be highlighted by using a more
position higher up in the buffer (typically the indentation of the
previous line). That position is the @dfn{anchor position} in the
syntactic element. If there is an entry after the syntactic symbol in
-the syntactic element list then it's either nil or that anchor position.
+the syntactic element list then it's either @code{nil} or that anchor position.
Here is an example. Suppose we had the following code as the only thing
in a C++ buffer @footnote{The line numbers in this and future examples
@defun c-lineup-assignments
@findex lineup-assignments (c-)
Line up the current line after the assignment operator on the first line
-in the statement. If there isn't any, return nil to allow stacking with
+in the statement. If there isn't any, return @code{nil} to allow stacking with
other line-up functions. If the current line contains an assignment
operator too, try to align it with the first one.
@defun c-langelem-pos langelem
@findex langelem-pos (c-)
-Return the anchor position in @var{langelem}, or nil if there is none.
+Return the anchor position in @var{langelem}, or @code{nil} if there is none.
@end defun
@defun c-langelem-col langelem &optional preserve-point
from the autoload. If it is a string (i.e., a project file name), it
checks to see if that exists in BUFFER's directory. If it is a
function, then it calls that function and expects it to return a file
-name or nil. If the file exists, then this directory is assumed to be
+name or @code{nil}. If the file exists, then this directory is assumed to be
part of a project, and @code{ede-directory-project-p} returns the
instance of @code{ede-project-autoload} that matched.
A brief description of the project or target. This is currently used
by the @samp{ede-speedbar} interface.
@item ede-want-file-p
-Return non-nil if a target will accept a given file.
+Return non-@code{nil} if a target will accept a given file.
It is generally unnecessary to override this. See the section on source
code.
@item ede-buffer-mine
-Return non-nil if a buffer belongs to this target. Used during
+Return non-@code{nil} if a buffer belongs to this target. Used during
association when a file is loaded. It is generally unnecessary to
override this unless you keep auxiliary files.
@end table
@end deffn
@deffn Method ede-map-any-target-p :AFTER this proc
-For project @var{THIS}, map @var{PROC} to all targets and return if any non-nil.
+For project @var{THIS}, map @var{PROC} to all targets and return if any non-@code{nil}.
Return the first non-@code{nil} value returned by @var{PROC}.
@end deffn
@end deffn
@deffn Method ede-find-target :AFTER proj buffer
-Fetch the target in @var{PROJ} belonging to @var{BUFFER} or nil.
+Fetch the target in @var{PROJ} belonging to @var{BUFFER} or @code{nil}.
@end deffn
@deffn Method ede-add-subproject :AFTER proj-a proj-b
NAME - The name of the file to find.
DIR - The directory root for this cpp-root project.
-It should return the fully qualified file name passed in from NAME@. If that file does not
-exist, it should return nil.
+It should return the fully qualified file name passed in from NAME@.
+If that file does not exist, it should return @code{nil}.
@end table
Non-@code{nil} if this is a metasubproject.
Usually, a subproject is determined by a parent project. If multiple top level
projects are grouped into a large project not maintained by EDE, then you need
-to set this to non-nil. The only effect is that the @code{dist} rule will then avoid
+to set this to non-@code{nil}. The only effect is that the @code{dist} rule will then avoid
making a tar file.
@end table
Non-@code{nil} if this is a metasubproject.
Usually, a subproject is determined by a parent project. If multiple top level
projects are grouped into a large project not maintained by EDE, then you need
-to set this to non-nil. The only effect is that the @code{dist} rule will then avoid
+to set this to non-@code{nil}. The only effect is that the @code{dist} rule will then avoid
making a tar file.
@end table
@cindex font menu, adding fonts
@vindex w32-fixed-font-alist
-If you have set w32-use-w32-font-dialog to nil, you can add fonts to
-the font menu by changing `w32-fixed-font-alist'. For example:
+If you have set w32-use-w32-font-dialog to @code{nil}, you can add fonts to
+the font menu by changing @code{w32-fixed-font-alist}. For example:
@example
(setq w32-fixed-font-alist
@code{smtpmail-smtp-server}.
If you are experiencing problems with sending large messages, check
-the value of the variable @code{smtpmail-debug-info}. If it is non-nil, you
-should set it to @code{nil}:
+the value of the variable @code{smtpmail-debug-info}. If it is
+non-@code{nil}, you should set it to @code{nil}:
@node Incoming mail with Rmail
@subsection Incoming mail with Rmail and POP3
left or right edge of the window.
Note that this is overridden by the variable
-@code{truncate-partial-width-windows} if that variable is non-nil
+@code{truncate-partial-width-windows} if that variable is non-@code{nil}
and the current buffer is not full-frame width.
In Emacs 20, use @code{hscroll-mode}.
@end defun
@defvar eieio-error-unsupported-class-tags
-If non-nil, @code{defclass} signals an error if a tag in a slot
+If non-@code{nil}, @code{defclass} signals an error if a tag in a slot
specifier is unsupported.
This option is here to support programs written with older versions of
@item my-class-name
An object of your class type.
@item (or null symbol)
- A symbol, or nil.
+ A symbol, or @code{nil}.
@end table
@item :allocation
of slots, and before the options.
@item :allow-nil-initform
-If this option is non-nil, and the @code{:initform} is @code{nil}, but
+If this option is non-@code{nil}, and the @code{:initform} is @code{nil}, but
the @code{:type} is specifies something such as @code{string} then allow
this to pass. The default is to have this option be off. This is
implemented as an alternative to unbound slots.
@defun class-slot-initarg class slot
For the given @var{class} return the :initarg associated with
@var{slot}. Not all slots have initargs, so the return value can be
-nil.
+@code{nil}.
@end defun
@node Base Classes
Zaretskii) in the same directory as Emacs, you should be OK.
@defun gnutls-available-p
-This function returns t if GnuTLS is available in this instance of Emacs.
+This function returns @code{t} if GnuTLS is available in this instance of Emacs.
@end defun
Oh, but sometimes things go wrong. Budgets aren't balanced,
If you know @code{defun}, the syntax of @code{ert-deftest} should look
familiar: This example defines a test named @code{pp-test-quote} that
-will pass if the three calls to @code{equal} all return true
-(non-nil).
+will pass if the three calls to @code{equal} all return non-@code{nil}.
@code{should} is a macro with the same meaning as @code{cl-assert} but
better error reporting. @xref{The @code{should} Macro}.
@item @code{(tag TAG)} selects all tests that have TAG on their tags list.
(Tags are optional labels you can apply to tests when you define them.)
@item @code{(satisfies PREDICATE)} selects all tests that satisfy PREDICATE,
-a function that takes a test as argument and returns non-nil if it is selected.
+a function that takes a test as argument and returns non-@code{nil} if
+it is selected.
@end itemize
Selectors that are frequently useful when selecting tests to run
@end example
In this example, @code{should} recorded the fact that (= (+ 1 2) 4)
-reduced to (= 3 4) before it reduced to nil. When debugging why the
+reduced to (= 3 4) before it reduced to @code{nil}. When debugging why the
test failed, it helps to know that the function @code{+} returned 3
here. ERT records the return value for any predicate called directly
within @code{should}.
In addition to @code{should}, ERT provides @code{should-not}, which
-checks that the predicate returns nil, and @code{should-error}, which
+checks that the predicate returns @code{nil}, and @code{should-error}, which
checks that the form called within it signals an error. An example
use of @code{should-error}:
predictable semantics like @code{with-temp-buffer}, @code{insert} or
@code{insert-file-contents-literally}, and to activate any desired mode
by calling the corresponding function directly, after binding the
-hook variables to nil. This avoids the above problems.
+hook variables to @code{nil}. This avoids the above problems.
@node Useful Techniques
that it returns. The explanation can be any object but should have a
comprehensible printed representation. If the return value of the
predicate needs no explanation for a given list of arguments, the
-explanation function should return nil.
+explanation function should return @code{nil}.
To associate an explanation function with a predicate, add the
property @code{ert-explainer} to the symbol that names the predicate.
by adding a list of the form @samp{("/dev/name" @var{function} @var{mode})} to
@code{eshell-virtual-targets}. The first element is the device name;
@var{function} may be either a lambda or a function name. If
-@var{mode} is nil, then the function is the output function; if it is
-non-nil, then the function is passed the redirection mode as a
+@var{mode} is @code{nil}, then the function is the output function; if it is
+non-@code{nil}, then the function is passed the redirection mode as a
symbol--@code{overwrite} for @code{>}, @code{append} for @code{>>}, or
@code{insert} for @code{>>>}--and the function is expected to return
the output function.
You've got to tell Gnus where to fetch the news from. Read
the documentation for information on how to do this. As a
-first start, put those lines in ~/.gnus.el:
+first start, put those lines in @file{~/.gnus.el}:
@example
(setq gnus-select-method '(nntp "news.yourprovider.net"))
@node FAQ 3-2
@subsubheading Question 3.2
-I'm working under Windows and have no idea what ~/.gnus.el means.
+I'm working under Windows and have no idea what @file{~/.gnus.el} means.
@subsubheading Answer
possibility to set environment variables. Create a new one with
name HOME and value C:\myhome. Rebooting is not necessary.
-Now to create ~/.gnus.el, say
+Now to create @file{~/.gnus.el}, say
@samp{C-x C-f ~/.gnus.el RET C-x C-s}.
in Emacs.
Of course. You can specify more sources for articles in the
variable gnus-secondary-select-methods. Add something like
-this in ~/.gnus.el:
+this in @file{~/.gnus.el}:
@example
(add-to-list 'gnus-secondary-select-methods
and is therefore quite fast. However you might prefer a one
file per group approach if your file system has problems with
many small files, the nnfolder back end is then probably the
-choice for you. To use nnml add the following to ~/.gnus.el:
+choice for you. To use nnml add the following to @file{~/.gnus.el}:
@example
(add-to-list 'gnus-secondary-select-methods '(nnml ""))
@end example
@noindent
-Make sure ~/.gnus.el isn't readable to others if you store
+Make sure @file{~/.gnus.el} isn't readable to others if you store
your password there. If you want to read your mail from a
traditional spool file on your local machine, it's
want to send mail via sendmail (or whichever MTA is playing
the role of sendmail on your system), you don't need to do
anything. However, if you want to send your mail to an
-SMTP Server you need the following in your ~/.gnus.el
+SMTP Server you need the following in your @file{~/.gnus.el}
@example
(setq send-mail-function 'smtpmail-send-it)
to use IMAP like POP3, that means Gnus fetches the mail from
the IMAP server and stores it on disk. If you want to do
this (you don't really want to do this) add the following to
-~/.gnus.el
+@file{~/.gnus.el}
@example
(add-to-list 'mail-sources '(imap :server "mail.mycorp.com"
@end example
@noindent
-in ~/.gnus.el to load enough old articles to prevent teared threads, replace 'some with t to load
+in @file{~/.gnus.el} to load enough old articles to prevent teared threads, replace 'some with @code{t} to load
all articles (Warning: Both settings enlarge the amount of data which is
fetched when you enter a group and slow down the process of entering a group).
are shown, its value is a regular expression, header lines
which match it are shown. So if you want author, subject,
date, and if the header exists, Followup-To and MUA / NUA
-say this in ~/.gnus.el:
+say this in @file{~/.gnus.el}:
@example
(setq gnus-visible-headers
@end example
@noindent
-in ~/.gnus.el. If you don't want HTML rendered, even if there's no text alternative add
+in @file{~/.gnus.el}. If you don't want HTML rendered, even if there's no text alternative add
@example
(setq mm-automatic-display (remove "text/html" mm-automatic-display))
@end example
@noindent
-in ~/.gnus.el.
+in @file{~/.gnus.el}.
@node FAQ 4-10
@subsubheading Question 4.10
can set options for the group. At the bottom of the buffer
you'll find an item that allows you to set variables
locally for the group. To disable threading enter
-gnus-show-threads as name of variable and nil as
+gnus-show-threads as name of variable and @code{nil} as
value. Hit button done at the top of the buffer when
you're ready.
@end example
@noindent
-in ~/.gnus.el.
+in @file{~/.gnus.el}.
An example might be better than thousand words, so here's
my nnmail-split-methods. Note that I send duplicates in a
@end example
@noindent
-in ~/.gnus.el.
+in @file{~/.gnus.el}.
You can reformat a paragraph by hitting @samp{M-q}
(as usual).
organization, address, name or body. The attribute name
can also be a string. In that case, this will be used as
a header name, and the value will be inserted in the
-headers of the article; if the value is `nil', the header
+headers of the article; if the value is @code{nil}, the header
name will be removed. You can also say (eval (foo bar)),
then the function foo will be evaluated with argument bar
and the result will be thrown away.
@end example
@noindent
-In your ~/.gnus.el, if you prefer on-the-fly spell-checking say
+In your @file{~/.gnus.el}, if you prefer on-the-fly spell-checking say
@example
(add-hook 'message-mode-hook (lambda () (flyspell-mode 1)))
@end example
@noindent
-in ~/.gnus.el. Change "^de\\." and "deutsch8" to something
+in @file{~/.gnus.el}. Change "^de\\." and "deutsch8" to something
that suits your needs.
@node FAQ 5-7
However, what you really want is the Insidious Big Brother
Database bbdb. Get it through the XEmacs package system or from
@uref{http://bbdb.sourceforge.net/, bbdb's homepage}.
-Now place the following in ~/.gnus.el, to activate bbdb for Gnus:
+Now place the following in @file{~/.gnus.el}, to activate bbdb for Gnus:
@example
(require 'bbdb)
@end example
@noindent
-in ~/.gnus.el. If you use Gnus 5.10, you can simply add an entry
+in @file{~/.gnus.el}. If you use Gnus 5.10, you can simply add an entry
@example
(x-face-file "~/.xface")
@subsubheading Answer
-Put this in ~/.gnus.el:
+Put this in @file{~/.gnus.el}:
@example
(setq gnus-confirm-mail-reply-to-news t)
@subsubheading Answer
Since 5.10 Gnus doesn't generate a sender header by
-default. For older Gnus' try this in ~/.gnus.el:
+default. For older Gnus' try this in @file{~/.gnus.el}:
@example
(eval-after-load "message"
@end example
@noindent
-in ~/.gnus.el. If you use Gnus 5.9 or earlier, you can use this
+in @file{~/.gnus.el}. If you use Gnus 5.9 or earlier, you can use this
instead (works for newer versions as well):
@example
it be much more convenient to have more direct access to
the archived message from Gnus? If you say yes, put this
snippet by Frank Haun <pille3003@@fhaun.de> in
-~/.gnus.el:
+@file{~/.gnus.el}:
@example
(defun my-archive-article (&optional n)
@subsubheading Answer
-Say something like this in ~/.gnus.el:
+Say something like this in @file{~/.gnus.el}:
@example
(setq nnmail-expiry-target "nnml:expired")
mail and news and store them on disk for reading them
later when you're offline. It kind of mimics offline
newsreaders like Forte Agent. If you want to use
-the Agent place the following in ~/.gnus.el if you are
+the Agent place the following in @file{~/.gnus.el} if you are
still using 5.8.8 or 5.9 (it's the default since 5.10):
@example
The reason for this could be the way Gnus reads its
active file, see the node "The Active File" in the Gnus
manual for things you might try to speed the process up.
-An other idea would be to byte compile your ~/.gnus.el (say
+An other idea would be to byte compile your @file{~/.gnus.el} (say
@samp{M-x byte-compile-file RET ~/.gnus.el
RET} to do it). Finally, if you have require
statements in your .gnus, you could replace them with
eval-after-load, which loads the stuff not at startup
time, but when it's needed. Say you've got this in your
-~/.gnus.el:
+@file{~/.gnus.el}:
@example
(require 'message)
@subsubheading Answer
A speed killer is setting the variable
-gnus-fetch-old-headers to anything different from nil,
+gnus-fetch-old-headers to anything different from @code{nil},
so don't do this if speed is an issue. To speed up
building of summary say
@end example
@noindent
-at the bottom of your ~/.gnus.el, this will make gnus
+at the bottom of your @file{~/.gnus.el}, this will make gnus
byte-compile things like
gnus-summary-line-format.
then you could increase the value of gc-cons-threshold
@end example
@noindent
-in ~/.gnus.el (thanks to Jesper harder for the last
+in @file{~/.gnus.el} (thanks to Jesper harder for the last
two suggestions). Finally if you are still using 5.8.8
or 5.9 and experience speed problems with summary
buffer generation, you definitely should update to
@table @dfn
@item ~/.gnus.el
-When the term ~/.gnus.el is used it just means your Gnus
-configuration file. You might as well call it ~/.gnus or
+When the term @file{~/.gnus.el} is used it just means your Gnus
+configuration file. You might as well call it @file{~/.gnus} or
specify another name.
@item Back End
Modify to suit your needs.
@vindex gnus-message-highlight-citation
-If @code{gnus-message-highlight-citation} is t, different levels of
+If @code{gnus-message-highlight-citation} is @code{t}, different levels of
citations are highlighted like in Gnus article buffers also in message
mode buffers.
You can inhibit this slow scoring on headers or body by setting the
variable @code{gnus-inhibit-slow-scoring}. If
@code{gnus-inhibit-slow-scoring} is regexp, slow scoring is inhibited if
-the group matches the regexp. If it is t, slow scoring on it is
+the group matches the regexp. If it is @code{t}, slow scoring on it is
inhibited for all groups.
Now, there's not much you can do about the slowness for news groups, but for
%g Article original short group name (string)
@end example
-If nil (the default) this will use @code{gnus-summary-line-format}.
+If @code{nil} (the default) this will use @code{gnus-summary-line-format}.
@item nnir-retrieve-headers-override-function
-If non-nil, a function that retrieves article headers rather than using
+If non-@code{nil}, a function that retrieves article headers rather than using
the gnus built-in function. This function takes an article list and
group as arguments and populates the `nntp-server-buffer' with the
retrieved headers. It should then return either 'nov or 'headers
indicating the retrieved header format. Failure to retrieve headers
should return @code{nil}.
-If this variable is nil, or if the provided function returns nil for a
-search result, @code{gnus-retrieve-headers} will be called instead."
+If this variable is @code{nil}, or if the provided function returns
+@code{nil} for a search result, @code{gnus-retrieve-headers} will be
+called instead."
@end table
search for determining the file name of the article. This, of course, is
way slower than the registry---if you set hundreds or even thousands of
marks this way, it might take some time. You can avoid this situation by
-setting @code{nnmairix-only-use-registry} to t.
+setting @code{nnmairix-only-use-registry} to @code{t}.
Maybe you also want to propagate marks the other way round, i.e., if you
tick an article in a "real" mail group, you'd like to have the same
While @code{spam-use-BBDB-exclusive} @emph{can} be used as an alias
for @code{spam-use-BBDB} as far as @code{spam.el} is concerned, it is
@emph{not} a separate back end. If you set
-@code{spam-use-BBDB-exclusive} to t, @emph{all} your BBDB splitting
+@code{spam-use-BBDB-exclusive} to @code{t}, @emph{all} your BBDB splitting
will be exclusive.
@end defvar
@end lisp
Given @var{props}, a list of text-properties, return the value of the
-face property, or nil.
+face property, or @code{nil}.
@item hfy-box-to-border-assoc
@findex hfy-box-to-border-assoc
This matches Emacs's behavior when deciding on which face attributes to
use, to the best of my understanding ).
-If @var{class} is nil, then you just get get whatever
+If @var{class} is @code{nil}, then you just get get whatever
@code{face-attr-construct} returns; i.e., the current specification in
effect for @var{face}.
@defopt idlwave-completion-force-default-case (@code{nil})
Non-@code{nil} means completion will always honor the settings in
-@code{idlwave-completion-case}. When nil (the default), entirely lower
+@code{idlwave-completion-case}. When @code{nil} (the default), entirely lower
case strings will always be completed to lower case, no matter what the
settings in @code{idlwave-completion-case}.
@end defopt
make updates as fast as possible. Note that by using these options,
absolutely no integrity checking is done. If your database somehow gets
corrupted, simply delete it and update. If `mairix-synchronous-update'
-is nil (the default), mairix will be called in a subprocess so Emacs
+is @code{nil} (the default), mairix will be called in a subprocess so Emacs
will still be usable while the update is done.
@end table
@vindex message-fill-column
@cindex auto-fill
Local value for the column beyond which automatic line-wrapping should
-happen for message buffers. If non-nil (the default), also turn on
+happen for message buffers. If non-@code{nil} (the default), also turn on
auto-fill in message buffers.
@item message-signature-separator
The hook @code{mh-kill-folder-suppress-prompt-functions} is an abnormal
hook run at the beginning of the command @kbd{k}. The hook functions
-are called with no arguments and should return a non-nil value to
+are called with no arguments and should return a non-@code{nil} value to
suppress the normal prompt when you remove a folder. This is useful
for folders that are easily regenerated. The default value of
@code{mh-search-p} suppresses the prompt on folders generated by
This may also be a function to do local parsing and identify point to be
in a non-standard label environment. The function must take an
argument @var{bound} and limit backward searches to this value. It
-should return either nil or a cons cell @code{(@var{function}
+should return either @code{nil} or a cons cell @code{(@var{function}
. @var{position})} with the function symbol and the position where the
special environment starts. See the Info documentation for an
example.
default does parse around each label to detect the correct label type,
but this process can be slow when a document contains thousands of
labels. If you use label prefixes consistently, you may speed up
-document parsing by setting this variable to a non-nil value. RefTeX
+document parsing by setting this variable to a non-@code{nil} value. RefTeX
will then compare the label prefix with the prefixes found in
`reftex-label-alist' and derive the correct label type in this way.
Possible values for this option are:
@defopt reftex-index-verify-function
A function which is called at each match during global indexing.
-If the function returns nil, the current match is skipped.
+If the function returns @code{nil}, the current match is skipped.
@end defopt
@defopt reftex-index-phrases-skip-indexed-matches
@defopt reftex-revisit-to-echo
Non-@code{nil} means, automatic citation display will revisit files if
-necessary. When nil, citation display in echo area will only be active
+necessary. When @code{nil}, citation display in echo area will only be active
for cached echo strings (see @code{reftex-cache-cite-echo}), or for
@BibTeX{} database files which are already visited by a live associated
buffers.
- supply arguments for macros like @code{\index} (flag 5)
@end example
-You may also set the variable itself to t or nil in order to turn all
-options on or off, respectively.@*
+You may also set the variable itself to @code{t} or @code{nil} in
+order to turn all options on or off, respectively.@*
Supplying labels in new sections and environments applies when creating
sections with @kbd{C-c C-s} and environments with @kbd{C-c C-e}.@*
Supplying macro arguments applies when you insert such a macro
@defopt reftex-revisit-to-follow
Non-@code{nil} means, follow-mode will revisit files if necessary.
-When nil, follow-mode will be suspended for stuff in unvisited files.
+When @code{nil}, follow-mode will be suspended for stuff in unvisited files.
@end defopt
@defopt reftex-allow-detached-macro-args
This can speed-up document parsing, but may in some cases reduce the
quality of the context used by RefTeX to describe a label.
@item
-Fixed bug in @code{reftex-create-bibtex-file} when @code{reftex-comment-citations}
-is non-nil.
+Fixed bug in @code{reftex-create-bibtex-file} when
+@code{reftex-comment-citations} is non-@code{nil}.
@item
Fixed bugs in indexing: Case-sensitive search, quotes before and/or
after words. Disabled indexing in comment lines.
@kbd{M-x reftex-reset-mode} now also removes the file with parsing
info.
@item
-Default of @code{reftex-revisit-to-follow} changed to nil.
+Default of @code{reftex-revisit-to-follow} changed to @code{nil}.
@end itemize
@noindent @b{Version 3.24}
@subsubsection Argument :indent
-Supplies the @code{INDENT} macro. When @code{INDENT} is non-nil, then
+Supplies the @code{INDENT} macro. When @code{INDENT} is non-@code{nil}, then
each line is individually indented with
@code{indent-according-to-mode} during macro processing.
@defun srecode-insert-fcn template dictionary &optional stream
@anchor{srecode-insert-fcn}
Insert @var{template} using @var{dictionary} into @var{stream}.
-If @var{stream} is nil, then use the current buffer.
+If @var{stream} is @code{nil}, then use the current buffer.
@end defun
@node Template Naming Conventions
@item
@samp{diary} (@kbd{y}): Override the option
@code{todo-include-in-diary}; that is, add @code{todo-nondiary-marker}
-if the option is non-nil, omit this marker if the option is nil.
+if the option is non-@code{nil}, omit this marker if the option is @code{nil}.
@samp{nonmarking} (@kbd{k}): Override the option
@code{todo-diary-nonmarking}; that is, add
-@code{diary-nonmarking-symbol} if the option is non-nil, omit this
-symbol if the option is nil. Since this symbol only applies to diary
+@code{diary-nonmarking-symbol} if the option is non-@code{nil}, omit this
+symbol if the option is @code{nil}. Since this symbol only applies to diary
items, the new item is automatically marked as such, i.e., lacks
@code{todo-nondiary-marker}.
@samp{time} (@kbd{t}): Prompt for entering a time string in
the minibuffer instead of automatically inserting the current time;
however, typing @key{RET} at the prompt enters the current time if
-@code{todo-always-add-time-string} is non-nil, otherwise it enters the
+@code{todo-always-add-time-string} is non-@code{nil}, otherwise it enters the
empty string (i.e., no time string).
@item
@samp{region} (@kbd{r}): Use the text of the selected region as the
text of the new item, and insert this in accordance with the item
insertion options and other parameters passed. If the option
-@code{todo-use-only-highlighted-region} is non-nil, then use the
+@code{todo-use-only-highlighted-region} is non-@code{nil}, then use the
region only when it is highlighted; otherwise, use the region
regardless of highlighting.
@end enumerate
@c @item
@c @kbd{i y h} does the same as the preceding command, except that
@c @code{todo-nondiary-marker} is added if @code{todo-include-in-diary} is
-@c non-nil and omitted if that option is nil; that is, the diary key @kbd{y}
-@c overrides the setting of this option.
+@c non-@code{nil} and omitted if that option is @code{nil}; that is,
+@c the diary key @kbd{y} @c overrides the setting of this option.
@c @item
@c @kbd{i y t h} does the same as the preceding command, except that it
@c prompts for a time string instead of automatically inserting the
@c current time; however, typing @key{RET} at the prompt returns the
-@c current time if @code{todo-always-add-time-string} is non-nil, otherwise
-@c the empty string (i.e., no time string).
+@c current time if @code{todo-always-add-time-string} is non-@code{nil},
+@c otherwise the empty string (i.e., no time string).
@c @item
@c @kbd{i y t t} does the same as the preceding command, except that it
@c prompts for the item's priority and inserts it accordingly.
@samp{time} (@kbd{t}): Edit the current item's time string, if
present; otherwise, add one. Typing @key{RET} at the prompt enters
-the current time if @code{todo-always-add-time-string} is non-nil,
+the current time if @code{todo-always-add-time-string} is non-@code{nil},
otherwise it enters the empty string (i.e., no time string).
@end enumerate
@samp{full} (@kbd{f}): Successively prompt for editing the year, month
(with completion) and day number parts of the current item's date
string, and, if the option @code{todo-always-add-time-string} is
-non-nil, also for editing its time string.
+non-@code{nil}, also for editing its time string.
@samp{calendar} (@kbd{c}): This pops up the Emacs calendar, and after
you type @key{RET} on a date in the calendar makes that date the
You may find it preferable not to delete empty todo categories but to
enable the option @code{todo-skip-archived-categories}. When this is
-non-nil, such empty todo categories are skipped over by the sequential
+non-@code{nil}, such empty todo categories are skipped over by the sequential
category navigation commands @kbd{f} and @kbd{b}, so they don't distract you
while navigating and you maintain the structural correspondence between
todo and archive files (you can also still jump to empty todo categories
@end defun
@defun url-cache-expired
-This function returns non-nil if a cache entry has expired (or is absent).
+This function returns non-@code{nil} if a cache entry has expired (or is absent).
The arguments are a URL and optional expiration delay in seconds
(default @var{url-cache-expire-time}).
@end defun
@defun wisent-skip-token
@anchor{wisent-skip-token}
Skip the lookahead token in order to resume parsing.
-Return nil.
+Return @code{nil}.
Must be used in error recovery semantic actions.
It typically looks like this:
@findex wisent-skip-block
@defun wisent-skip-block
Safely skip a block in order to resume parsing.
-Return nil.
+Return @code{nil}.
Must be used in error recovery semantic actions.
A block is data between an open-delimiter (syntax class @code{(}) and