Run tests in module doc update

[brycegbrazen]

Add a bit of additional information about running tests in a module for new users.

TODO:

Would still likely to clarify if you can use globbing at all with when running a test for a specific module (the * operator)

[nicoddemus]

Would still likely to clarify if you can use globbing at all with when running a test for a specific module (the * operator)

pytest itself does not do any processing in that front, your shell does the * processing (as with any other tool).