patch 9.0.0845: shell command with just space gives strange error

Problem:    Shell command with just space gives strange error.
Solution:   Skip white space at start of the argument. (Christian Brabandt,
            Shane-XB-Qian, closes #11515, closes #11495)
diff --git a/src/version.c b/src/version.c
index 5d4511d..097fcf6 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    845,
+/**/
     844,
 /**/
     843,