patch 8.2.0426: some errors were not tested for

Problem:    Some errors were not tested for.
Solution:   Add tests. (Dominique Pelle, closes #5824)
diff --git a/src/testdir/test_options.vim b/src/testdir/test_options.vim
index fbc6dc1..5cae272 100644
--- a/src/testdir/test_options.vim
+++ b/src/testdir/test_options.vim
@@ -255,9 +255,10 @@
   call assert_fails('set regexpengine=3', 'E474:')
   call assert_fails('set history=10001', 'E474:')
   call assert_fails('set numberwidth=21', 'E474:')
-  call assert_fails('set colorcolumn=-a')
-  call assert_fails('set colorcolumn=a')
-  call assert_fails('set colorcolumn=1,')
+  call assert_fails('set colorcolumn=-a', 'E474:')
+  call assert_fails('set colorcolumn=a', 'E474:')
+  call assert_fails('set colorcolumn=1,', 'E474:')
+  call assert_fails('set colorcolumn=1;', 'E474:')
   call assert_fails('set cmdheight=-1', 'E487:')
   call assert_fails('set cmdwinheight=-1', 'E487:')
   if has('conceal')
@@ -293,9 +294,13 @@
     call assert_fails('set guicursor=i-ci,r-cr:h', 'E545:')
     call assert_fails('set guicursor=i-ci', 'E545:')
     call assert_fails('set guicursor=x', 'E545:')
+    call assert_fails('set guicursor=x:', 'E546:')
     call assert_fails('set guicursor=r-cr:horx', 'E548:')
     call assert_fails('set guicursor=r-cr:hor0', 'E549:')
   endif
+  if has('mouseshape')
+    call assert_fails('se mouseshape=i-r:x', 'E547:')
+  endif
   call assert_fails('set backupext=~ patchmode=~', 'E589:')
   call assert_fails('set winminheight=10 winheight=9', 'E591:')
   call assert_fails('set winminwidth=10 winwidth=9', 'E592:')