(display_tool_bar_line): Skip glyphs which are too big

[gnu-emacs] / lispref / intro.texi

diff --git a/lispref/intro.texi b/lispref/intro.texi
index 8c3501c823b955aba167ddd40f2cc1661d08a304..7e1b6155b3545ab5a98a5dfb522ec05e70707b76 100644 (file)
--- a/lispref/intro.texi
+++ b/lispref/intro.texi
@@ -1,7 +1,7 @@
 @c -*-texinfo-*-
 @c This is part of the GNU Emacs Lisp Reference Manual.
 @c Copyright (C) 1990, 1991, 1992, 1993, 1994, 2002, 2003, 2004,
-@c   2005 Free Software Foundation, Inc.
+@c   2005, 2006 Free Software Foundation, Inc.
 @c See the file elisp.texi for copying conditions.
 @setfilename ../info/intro
 
@@ -163,7 +163,7 @@ person reading this manual, are thought of as ``the programmer'' and are
 addressed as ``you''.  ``The user'' is the person who uses Lisp
 programs, including those you write.
 
-@cindex fonts
+@cindex fonts in this manual
   Examples of Lisp code are formatted like this: @code{(list 1 2 3)}.
 Names that represent metasyntactic variables, or arguments to a function
 being described, are formatted like this: @var{first-number}.
@@ -187,14 +187,14 @@ readers.  After the Lisp reader has read either @samp{()} or @samp{nil},
 there is no way to determine which representation was actually written
 by the programmer.
 
-  In this manual, we use @code{()} when we wish to emphasize that it
-means the empty list, and we use @code{nil} when we wish to emphasize
+  In this manual, we write @code{()} when we wish to emphasize that it
+means the empty list, and we write @code{nil} when we wish to emphasize
 that it means the truth value @var{false}.  That is a good convention to use
 in Lisp programs also.
 
 @example
 (cons 'foo ())                ; @r{Emphasize the empty list}
-(not nil)                     ; @r{Emphasize the truth value @var{false}}
+(setq foo-flag nil)           ; @r{Emphasize the truth value @var{false}}
 @end example
 
 @cindex @code{t}, uses of
@@ -212,6 +212,11 @@ to use them as constants in a program.  An attempt to change their
 values results in a @code{setting-constant} error.  @xref{Constant
 Variables}.
 
+@defun booleanp object
+Return non-nil iff @var{object} is one of the two canonical boolean
+values: @code{t} or @code{nil}.
+@end defun
+
 @node Evaluation Notation
 @subsection Evaluation Notation
 @cindex evaluation notation