patch 8.2.3925: diff mode confused by NUL bytes

Problem:    Diff mode confused by NUL bytes.
Solution:   Handle NUL bytes differently. (Christian Brabandt, closes #9421,
            closes #9418)
diff --git a/src/version.c b/src/version.c
index 90bd422..60b1e5c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3925,
+/**/
     3924,
 /**/
     3923,