config/diff.txt: drop spurious backtick

Martin Ågren · gitster · commit ef39d22fe681 · 2019-03-07T09:25:32.000+09:00
Signed-off-by: Martin Ågren &lt;martin.agren@gmail.com&gt;
Signed-off-by: Junio C Hamano &lt;gitster@pobox.com&gt;
diff --git a/Documentation/config/diff.txt b/Documentation/config/diff.txt
@@ -10,7 +10,7 @@ diff.autoRefreshIndex::
 
 diff.dirstat::
 	A comma separated list of `--dirstat` parameters specifying the
-	default behavior of the `--dirstat` option to linkgit:git-diff[1]`
+	default behavior of the `--dirstat` option to linkgit:git-diff[1]
 	and friends. The defaults can be overridden on the command line
 	(using `--dirstat=<param1,param2,...>`). The fallback defaults
 	(when not changed by `diff.dirstat`) are `changes,noncumulative,3`.
