patch 7.4.1844
Problem:    Using old function name in comment.  More functions should start
            with test_.
Solution:   Rename function in comment. (Higashi Higashi) Rename
            disable_char_avail_for_testing() to test_disable_char_avail().
            And alloc_fail() to test_alloc_fail().
diff --git a/src/testdir/test_cursor_func.vim b/src/testdir/test_cursor_func.vim
index d3236e6..4b2a9b8 100644
--- a/src/testdir/test_cursor_func.vim
+++ b/src/testdir/test_cursor_func.vim
@@ -44,9 +44,9 @@
   new
   call setline(1, ['func()', '{', '}', '----'])
   autocmd! CursorMovedI * call s:Highlight_Matching_Pair()
-  call disable_char_avail_for_testing(1)
+  call test_disable_char_avail(1)
   exe "normal! 3Ga\<Down>X\<Esc>"
-  call disable_char_avail_for_testing(0)
+  call test_disable_char_avail(0)
   call assert_equal('-X---', getline(4))
   autocmd! CursorMovedI *
   quit!