patch 8.1.0533: screendump tests can be flaky
Problem: Screendump tests can be flaky.
Solution: Add VerifyScreenDump to the pattern of flaky tests.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 9ba5d13..56bb3d3 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -330,7 +330,7 @@
\ ]
" Pattern indicating a common flaky test failure.
-let s:flaky_errors_re = 'StopVimInTerminal'
+let s:flaky_errors_re = 'StopVimInTerminal\|VerifyScreenDump'
" Locate Test_ functions and execute them.
redir @q