patch 8.0.0291: Visual block insertion does not insert in all lines

Problem:    Visual block insertion does not insert in all lines.
Solution:   Don't bail out of insert too early. Add a test. (Christian
            Brabandt, closes #1290)
diff --git a/src/version.c b/src/version.c
index c1b998b..3316a0a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -765,6 +765,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    291,
+/**/
     290,
 /**/
     289,