patch 8.1.1831: confusing skipped message

Problem:    Confusing skipped message.
Solution:   Drop "run" from "run start the GUI".

src/testdir/check.vim

@@ -83,7 +83,7 @@ endfunc
 command CheckCanRunGui call CheckCanRunGui()
 func CheckCanRunGui()
   if !has('gui') || ($DISPLAY == "" && !has('gui_running'))
-    throw 'Skipped: cannot run start the GUI'
+    throw 'Skipped: cannot start the GUI'
   endif
 endfunc
 

src/version.c

@@ -769,6 +769,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1831,
 /**/
     1830,
 /**/