; Fix more @var/@code mixups in Elisp manual

* doc/lispref/text.texi (Replacing): Fix markup for function
arguments.

doc/lispref/text.texi

@@ -4511,33 +4511,33 @@ would destroy these properties.  However, the latter combination is
 typically faster (@xref{Deletion}, and @ref{Insertion}).
 
 For its working, @code{replace-buffer-contents} needs to compare the
-contents of the original buffer with that of @code{source} which is a
+contents of the original buffer with that of @var{source} which is a
 costly operation if the buffers are huge and there is a high number of
 differences between them.  In order to keep
 @code{replace-buffer-contents}'s runtime in bounds, it has two
 optional arguments.
 
-@code{max-secs} defines a hard boundary in terms of seconds.  If given
+@var{max-secs} defines a hard boundary in terms of seconds.  If given
 and exceeded, it will fall back to @code{delete-region} and
 @code{insert-buffer-substring}.
 
-@code{max-costs} defines the quality of the difference computation.
-If the actual costs exceed this limit, heuristics are used to provide
-a faster but suboptimal solution.  The default value is 1000000.
+@var{max-costs} defines the quality of the difference computation.  If
+the actual costs exceed this limit, heuristics are used to provide a
+faster but suboptimal solution.  The default value is 1000000.
 
 @code{replace-buffer-contents} returns t if a non-destructive
-replacement could be performed.  Otherwise, i.e., if @code{max-secs}
+replacement could be performed.  Otherwise, i.e., if @var{max-secs}
 was exceeded, it returns nil.
 @end deffn
 
 @defun replace-region-contents beg end replace-fn &optional max-secs max-costs
-This function replaces the region between @code{beg} and @code{end}
-using the given @code{replace-fn}.  The function @code{replace-fn} is
+This function replaces the region between @var{beg} and @var{end}
+using the given @var{replace-fn}.  The function @var{replace-fn} is
 run in the current buffer narrowed to the specified region and it
 should return either a string or a buffer replacing the region.
 
 The replacement is performed using @code{replace-buffer-contents} (see
-above) which also describes the @code{max-secs} and @code{max-costs}
+above) which also describes the @var{max-secs} and @var{max-costs}
 arguments and the return value.
 
 Note: If the replacement is a string, it will be placed in a temporary