[glib/arnaudb/option-flag-append-empty-line] Fix Since tag.

[Arnaud B. <arnaudb src gnome org>]

commit f7b2e8cfe69cbc5a7f13b242a0733d0549e55d31
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Thu Sep 12 17:51:04 2019 +0200

    Fix Since tag.

 glib/goption.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/glib/goption.h b/glib/goption.h
index 7a07901b5..198eebd33 100644
--- a/glib/goption.h
+++ b/glib/goption.h
@@ -76,7 +76,7 @@ typedef struct _GOptionEntry   GOptionEntry;
  *     It is not safe to use this option, unless all option groups are under
  *     your direct control. Since 2.8.
  * @G_OPTION_FLAG_APPEND_EMPTY_LINE: This flag adds an empty line after the
- *     one of the option, allowing to visually group options. Since: 2.63.1.
+ *     one of the option, allowing to visually group options. Since: 2.64.
  *
  * Flags which modify individual options.
  */