patch 8.2.1593: tests do not check the error number properly

Problem:    Tests do not check the error number properly.0
Solution:   Add a colon after the error number. (closes #6869)
diff --git a/src/testdir/test_move.vim b/src/testdir/test_move.vim
index 8c40369..98c7665 100644
--- a/src/testdir/test_move.vim
+++ b/src/testdir/test_move.vim
@@ -33,8 +33,8 @@
   call assert_true(&modified)
   set nomodified
 
-  call assert_fails('1,2move 1', 'E134')
-  call assert_fails('2,3move 2', 'E134')
+  call assert_fails('1,2move 1', 'E134:')
+  call assert_fails('2,3move 2', 'E134:')
   call assert_fails("move -100", 'E16:')
   call assert_fails("move +100", 'E16:')
   call assert_fails('move', 'E16:')