…olved

Rename some variables to make explicit that they are file names,
not files, and paths, not directories.

Extract a method for creating path to spec files.

Ignore the second item in the tuples returned by os.walk.

Adjust indendation

Only the call to __import__ can throw. So we can use a for-else
to make explicit what should be done in case it doesn't throw.

the importing of local non-installed modules

…ions

…text manager

There is no real setup/teardown work needing to be done
in that method, it just prepares the module name and delegates
to another method. So using a context manager adds little
benefit. This also simplifies the implementation of
ExampleCollector#modules a bit more.

- Give more information about the code object.
- Decouple _create_module_object from its particular usage
in the class.

…e_code_at

…ethods

- Remove unnecessary conversion to list
- Remove old unused variable binding in with statement