Yoann Lamouroux authored 6 years ago and jvoisin committed 6 years ago

`/usr/bin/python3` -> `/usr/bin/env python3`

It's always better to trust the environment defined path to bin/python, as
virtualenv become the way to go.

Closes #60

Note: this changeset also ensures that clean.cleaned.docx is removed
up after the pytest is over.