patch 9.1.0917: various vartabstop and shiftround bugs when shifting lines

Problem:  various vartabstop and shiftround bugs when shifting lines
Solution: Fix the bugs, add new tests for shifting lines in various ways
          (Gary Johnson)

fixes: #14891
closes: #16193

Signed-off-by: Gary Johnson <garyjohn@spocom.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 5933af3..96b3803 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    917,
+/**/
     916,
 /**/
     915,