emacs-27 be1b351: Fix reference to 'diff-font-lock-syntax' in diff-mode documentation

[Eli Zaretskii]

branch: emacs-27
commit be1b3512f772133ac9760f93fedabd672ba04598
Author: Daniel Martín <mardani29@yahoo.es>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix reference to 'diff-font-lock-syntax' in diff-mode documentation
    
    * doc/emacs/files.texi (Diff Mode): Add the omitted name of the
    variable.  (Bug#47129)
---
 doc/emacs/files.texi | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/doc/emacs/files.texi b/doc/emacs/files.texi
index 88fcdd0..b9e45b9 100644
--- a/doc/emacs/files.texi
+++ b/doc/emacs/files.texi
@@ -1652,8 +1652,9 @@ modify the original (``old'') source files rather than 
the patched
 (``new'') source files.
 
 @vindex diff-font-lock-syntax
-  If non-@code{nil}, fragments of source in hunks are highlighted
-according to the appropriate major mode.
+  If @code{diff-font-lock-syntax} is non-@code{nil}, fragments of
+source in hunks are highlighted according to the appropriate major
+mode.
 
 @node Copying and Naming
 @section Copying, Naming and Renaming Files