updated for version 7.3.397

Problem:    ":helpgrep" does not work properly when 'encoding' is not utf-8 or
            latin1.
Solution:   Convert non-ascii lines to 'encoding'. (Yasuhiro Matsumoto)

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    397,
 /**/
     396,
 /**/