patch 7.4.1740
Problem: syn-cchar defined with matchadd() does not appear if there are no
other syntax definitions which matches buffer text.
Solution: Check for startcol. (Ozaki Kiichi, haya14busa, closes #757)
diff --git a/src/testdir/test_alot_utf8.vim b/src/testdir/test_alot_utf8.vim
index e55555e..8824ee5 100644
--- a/src/testdir/test_alot_utf8.vim
+++ b/src/testdir/test_alot_utf8.vim
@@ -5,4 +5,5 @@
" files, so that they can be run by themselves.
source test_expr_utf8.vim
+source test_matchadd_conceal_utf8.vim
source test_regexp_utf8.vim