patch 9.0.0783: ":!" doesn't do anything but does update the previous command

Problem:    ":!" doesn't do anything but does update the previous command.
Solution:   Do not have ":!" change the previous command. (Martin Tournoij,
            closes #11372)
diff --git a/src/version.c b/src/version.c
index 433152e..0f6b59a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    783,
+/**/
     782,
 /**/
     781,