patch 8.1.1544: some balloon tests don't run when they can
Problem: Some balloon tests don't run when they can.
Solution: Split GUI balloon tests off into a separate file. (Ozaki Kiichi,
closes #4538) Change the feature check into a command for
consistency.
diff --git a/src/testdir/test_matchadd_conceal_utf8.vim b/src/testdir/test_matchadd_conceal_utf8.vim
index fb27577..98ed2cb 100644
--- a/src/testdir/test_matchadd_conceal_utf8.vim
+++ b/src/testdir/test_matchadd_conceal_utf8.vim
@@ -1,8 +1,7 @@
" Test for matchadd() and conceal feature using utf-8.
-if !has('conceal')
- throw 'Skipped, conceal feature missing'
-endif
+source check.vim
+CheckFeature conceal
if !has('gui_running') && has('unix')
set term=ansi