Documentation tests are no longer run by default

While trying to get pytest 3.x to work (#5688), I noticed that some of the rst files do not pass even with current master (i.e., the built-in pytest). The problem seems to be that currently none of the doctests get run. E.g., a recent travis log [1] shows only test files, while older ones also show regular python files with doctests as well as the rst files [2]. So, somehow they are getting omitted… (or am I missing something totally dumb???)

[1] recent log, no doctests: https://travis-ci.org/astropy/astropy/jobs/191377361 [2] older log, includes doctests: https://travis-ci.org/astropy/astropy/jobs/158108205

[pllim]

Just as I suspected… https://travis-ci.org/astropy/astropy/jobs/190406534 does not have doctest for the first time. I think the mistake here is introducing pytest 3.x feature in #5678, which is not ready for the transition yet. It was necessary for testing with pytest 3.x locally (at the hack day) but it should not be propagated to master until bundled version is removed. I propose changing [tool:pytest] back to [pytest] in current master and re-introduce the change in #5688. What do you think?

[mhvk]

@pllim - nice tracking down! I agree we need to undo the change in setup.cfg.