patch 8.0.1329: when a flaky test fails it also often fails the second time
Problem: When a flaky test fails it also often fails the second time.
Solution: Sleep a couple of seconds before the second try.
diff --git a/src/testdir/runtest.vim b/src/testdir/runtest.vim
index 8eef166..c953d6d 100644
--- a/src/testdir/runtest.vim
+++ b/src/testdir/runtest.vim
@@ -286,6 +286,10 @@
call add(s:messages, 'Flaky test failed, running it again')
let first_run = v:errors
+ " Flakiness is often caused by the system being very busy. Sleep a couple
+ " of seconds to have a higher chance of succeeding the second time.
+ sleep 2
+
let v:errors = []
call RunTheTest(s:test)
if len(v:errors) > 0