@end defun
@defun last list &optional n
-This function returns the last link of @var{list}. The
-@code{car} of this link is the list's last element. If @var{list} is
-null, @code{nil} is returned. If @var{n} is non-nil the
-@var{n}-th-to-last link is returned instead, or the whole @var{list} if
-@var{n} is bigger than @var{list}'s length.
+This function returns the last link of @var{list}. The @code{car} of
+this link is the list's last element. If @var{list} is null,
+@code{nil} is returned. If @var{n} is non-@code{nil}, the
+@var{n}th-to-last link is returned instead, or the whole of @var{list}
+if @var{n} is bigger than @var{list}'s length.
@end defun
@defun safe-length list
@code{read-from-minibuffer}. The keymap used is
@code{minibuffer-local-map}.
-The optional argument @var{history}, if non-nil, specifies a history
-list and optionally the initial position in the list. The optional
-argument @var{default} specifies a default value to return if the user
-enters null input; it should be a string. The optional argument
-@var{inherit-input-method} specifies whether to inherit the current
-buffer's input method.
+The optional argument @var{history}, if non-@code{nil}, specifies a
+history list and optionally the initial position in the list. The
+optional argument @var{default} specifies a default value to return if
+the user enters null input; it should be a string. The optional
+argument @var{inherit-input-method} specifies whether to inherit the
+current buffer's input method.
This function is a simplified interface to the
@code{read-from-minibuffer} function:
If your mode does not use any of the other machinery of Font Lock
(i.e. it only uses the @code{font-lock-face} property), you can tell
Emacs not to load all of font-lock.el (unless it's already loaded), by
-setting the variable @code{font-lock-core-only} to non-nil as part of
-the @code{font-lock-defaults} settings. Here is the canonical way to
-do this:
+setting the variable @code{font-lock-core-only} to non-@code{nil} as
+part of the @code{font-lock-defaults} settings. Here is the canonical
+way to do this:
@example
(set (make-local-variable 'font-lock-defaults)
@result{} t
@end example
-If the optional argument @var{genericp} is non-nil, this function
-returns @code{t} if @var{charcode} is a generic character
+If the optional argument @var{genericp} is non-@code{nil}, this
+function returns @code{t} if @var{charcode} is a generic character
(@pxref{Splitting Characters}).
@end defun
(@pxref{Customization}).
@strong{Warning:} If the @code{defconst} and @code{defvar} special
-forms are used while the variable has a local binding, they set the
-local binding's value; the global binding is not changed. This is not
-what you usually want. To prevent it, use these special forms at top
-level in a file, where normally no local binding is in effect, and make
-sure to load the file before making a local binding for the variable.
+forms are used while the variable has a local binding (made with
+@code{let}, or a function argument), they set the local-binding's
+value; the top-level binding is not changed. This is not what you
+usually want. To prevent it, use these special forms at top level in
+a file, where normally no local binding is in effect, and make sure to
+load the file before making a local binding for the variable.
@node Tips for Defining
@section Tips for Defining Variables Robustly
@end defvar
@defun risky-local-variable-p sym
-Returns non-nil if @var{sym} is risky for any of the reasons stated above.
+Returns non-@code{nil} if @var{sym} is risky for any of the reasons
+stated above.
@end defun
The @samp{Eval:} ``variable'' is also a potential loophole, so Emacs