patch 8.2.3111: Vim9: confusing error with extra whitespace before colon

Problem:    Vim9: confusing error with extra whitespace before colon.
Solution:   Check for colon after white space. (closes #8513)
diff --git a/src/version.c b/src/version.c
index b448822..0653c27 100644
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3111,
+/**/
     3110,
 /**/
     3109,