… Hypothesis test.

Signed-off-by: Michael Seifert <m.seifert@digitalernachschub.de>

…thout explicit "asyncio" marker when "--asyncio-mode=auto" is set.

The option --asyncio-mode=auto marks all async functions with the asyncio mark during the collection phase. However, when pytest collects the Hypothesis test, the @given decorator has already been applied and the Hypothesis test function is no longer a coroutine.

This commit extends the "pytest_pycollect_makeitem" hook to mark Hypothesis tests whose function body is a coroutine.

Closes pytest-dev#258

Signed-off-by: Michael Seifert <m.seifert@digitalernachschub.de>