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_mksession_utf8.vim b/src/testdir/test_mksession_utf8.vim
index 6bf5823..7d9a909 100644
--- a/src/testdir/test_mksession_utf8.vim
+++ b/src/testdir/test_mksession_utf8.vim
@@ -3,9 +3,8 @@
set encoding=utf-8
scriptencoding utf-8
-if !has('mksession')
- throw 'Skipped, mksession feature missing'
-endif
+source check.vim
+CheckFeature mksession
func Test_mksession_utf8()
tabnew