[python-committers] Can I just rerun a test on AppVeyor?

[Terry Reedy]

I can restart a test on just Travis when AppVeyor (and now MSTS) all 
passed.  But for the last few hours, test_async has failed 1/4 to 1/3 of 
the runs.  This means that test_async failed twice, so I suspect that it 
actually fails about half the time.  A connection error seems to be the 
main culprit.

I could not find a rebuild button on the AppVeyor page, even after 
connecting my github account with AppVeyor.  I ended up closing and 
reopening, but this wastes resources on Travis and now MSTS.

On the rerun, it failed the first time and then passed on the rerun