@defun redraw-frame &optional frame
This function clears and redisplays frame @var{frame}. If @var{frame}
-is omitted or nil, it redraws the selected frame.
+is omitted or @code{nil}, it redraws the selected frame.
@end defun
Even more powerful is @code{redraw-display}:
If the optional argument @var{first} is an integer, it denotes the index
(starting with 0) of the first line of @var{window}'s glyph matrix to be
returned. Note that if @var{window} has a header line, the line with
-index 0 is that header line. If @var{first} is nil, the first line to
+index 0 is that header line. If @var{first} is @code{nil}, the first line to
be considered is determined by the value of the optional argument
@var{body}: If @var{body} is non-@code{nil}, this means to start with
the first line of @var{window}'s body, skipping any header line, if
If the optional argument @var{last} is an integer, it denotes the index
of the last line of @var{window}'s glyph matrix that shall be returned.
-If @var{last} is nil, the last line to be considered is determined by
+If @var{last} is @code{nil}, the last line to be considered is determined by
the value of @var{body}: If @var{body} is non-@code{nil}, this means to
use the last line of @var{window}'s body, omitting @var{window}'s mode
line, if present. Otherwise, this means to use the last line of
If this is @code{above}, the frame's window-system window is displayed
above all other window-system windows that do not have the @code{above}
-property set. If this is nil, the frame's window is displayed below all
+property set. If this is @code{nil}, the frame's window is displayed below all
windows that have the @code{above} property set and above all windows
that have the @code{below} property set. If this is @code{below}, the
frame's window is displayed below all windows that do not have the
@item parent-frame
If non-@code{nil}, this means that this frame is a child frame
(@pxref{Child Frames}), and this parameter specifies its parent frame.
-If nil, this means that this frame is a normal, top-level frame.
+If @code{nil}, this means that this frame is a normal, top-level frame.
@vindex delete-before, a frame parameter
@item delete-before
If non-@code{nil}, this frame's window-system window is drawn without
decorations, like the title, minimize/maximize boxes and external
borders. This usually means that the window cannot be dragged, resized,
-iconified, maximized or deleted with the mouse. If nil, the frame's
+iconified, maximized or deleted with the mouse. If @code{nil}, the frame's
window is usually drawn with all the elements listed above unless their
display has been suspended via window manager settings.
@end defun
@defun bool-vector-subsetp a b
-Return @code{t} if every @code{t} value in @var{a} is also t in
+Return @code{t} if every @code{t} value in @var{a} is also @code{t} in
@var{b}, @code{nil} otherwise. All arguments should be bool vectors of the
same length.
@end defun
@var{operation} is a symbol representing the kind of change, one of:
`set', `let', `unlet', `makunbound', and `defvaralias'.
@var{where} is a buffer if the buffer-local value of the variable is
-being changed, nil otherwise.
+being changed, @code{nil} otherwise.
@end defun
@defun remove-variable-watch symbol watch-function
Property names might be @code{:application}, @code{:protocol},
@code{:user} and @code{:machine}. The property value of
@code{:application} is a symbol, all other property values are
-strings. All properties are optional; if @var{criteria} is nil, it
+strings. All properties are optional; if @var{criteria} is @code{nil}, it
always applies. Example:
@example
@end group
@end example
- If @var{criteria} is nil, it applies for all remote connections.
+ If @var{criteria} is @code{nil}, it applies for all remote connections.
Therefore, the example above would be equivalent to
@example