patch 9.1.0838: vimtutor is bash-specific

Problem:  vimtutor is bash-specific (after 17c71daf83f45c3ee8)
Solution: port back to POSIX sh (Aliaksei Budavei).

Signed-off-by: Aliaksei Budavei <0x000c70@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index 8ca7592..d213e66 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    838,
+/**/
     837,
 /**/
     836,