Base completion on number of words (#133)

* Install potodo from a branch

* Add a note about reversion

Co-authored-by: W. H. Wang <[email protected]>

Author: m-aciek

requirements.txt

@@ -1,6 +1,8 @@
 gitpython
 urllib3
-potodo
+# change this back to native "potodo" after the upstream PR is merged
+# ref: https://git.afpy.org/AFPy/potodo/pulls/20
+git+https://git.afpy.org/maciek/potodo.git@word-counts
 jinja2
 docutils
 sphinx