view doc/README @ 33695:eeed23508383

run-tests: drop required (feature !) style lines when the output is missing

Essentially, these were acting as a verbose (?) flag, since they weren't being
dropped when required.  Foozy has a nice description [1].  Basically, a couple
more places needed to check the features before treating it as optional.

I don't like how test-run-tests.py had to be hacked, but _hghave() can't be made
a static method.  The test change was a change while developing `debugssl`,
prior to tightening up the cases where the message is printed, that this fix
would have caught.

[1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-July/101941.html

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