patch 8.2.4907: some users do not want a line comment always inserted

Problem:    Some users do not want a line comment always inserted.
Solution:   Add the '/' flag to 'formatoptions' to not repeat the comment
            leader after a statement when using "o".
diff --git a/src/version.c b/src/version.c
index d5963d4..f53be12 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    4907,
+/**/
     4906,
 /**/
     4905,