@c -*-texinfo-*-
@c This is part of the GNU Emacs Lisp Reference Manual.
-@c Copyright (C) 1990-1995, 1998-1999, 2001-2012 Free Software Foundation, Inc.
+@c Copyright (C) 1990-1995, 1998-1999, 2001-2015 Free Software
+@c Foundation, Inc.
@c See the file elisp.texi for copying conditions.
@node Symbols
@chapter Symbols
@xref{Macros}.
As previously noted, Emacs Lisp allows the same symbol to be defined
-both as a variable (e.g.@: with @code{defvar}) and as a function or
-macro (e.g.@: with @code{defun}). Such definitions do not conflict.
+both as a variable (e.g., with @code{defvar}) and as a function or
+macro (e.g., with @code{defun}). Such definitions do not conflict.
These definition also act as guides for programming tools. For
example, the @kbd{C-h f} and @kbd{C-h v} commands create help buffers
modes. @xref{Setting Hooks}.
@item pure
-This property is used internally to mark certain named functions for
-byte compiler optimization. Do not set it.
+If the value is non-@code{nil}, the named function is considered to be
+side-effect free. Calls with constant arguments can be evaluated at
+compile time. This may shift run time errors to compile time.
@item risky-local-variable
If the value is non-@code{nil}, the named variable is considered risky
Safety}) as well as for byte compiler optimizations. Do not set it.
@item variable-documentation
-If non-@code{nil}, this specifies the named vaariable's documentation
+If non-@code{nil}, this specifies the named variable's documentation
string. This is set automatically by @code{defvar} and related
functions. @xref{Defining Faces}.
@end table