patch 8.2.5008: when 'formatoptions' contains "/" wrongly wrapping comment

Problem:    When 'formatoptions' contains "/" wrongly wrapping a long trailing
            comment.
Solution:   Pass the OPENLINE_FORMAT flag.
diff --git a/src/textformat.c b/src/textformat.c
index a6a3b4d..7e32c1c 100644
--- a/src/textformat.c
+++ b/src/textformat.c
@@ -371,6 +371,7 @@
 	open_line(FORWARD, OPENLINE_DELSPACES + OPENLINE_MARKFIX
 		+ (fo_white_par ? OPENLINE_KEEPTRAIL : 0)
 		+ (do_comments ? OPENLINE_DO_COM : 0)
+		+ OPENLINE_FORMAT
 		+ ((flags & INSCHAR_COM_LIST) ? OPENLINE_COM_LIST : 0)
 		, ((flags & INSCHAR_COM_LIST) ? second_indent : old_indent),
 		&did_do_comment);