patch 8.2.3124: Vim9: no error for white space between option and "=9"

Problem:    Vim9: no error for white space between option and "=9".
Solution:   Check for extraneous white space. (issue #8408)
diff --git a/src/version.c b/src/version.c
index 56c9f90..1fb2243 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3124,
+/**/
     3123,
 /**/
     3122,