fix shebangs

teach_auto/clone_forks.py

-#!/usr/bin/env python
+#!/usr/bin/env python3
 # Reads JSON output from collect-forks (either as a file or in stdin)
 # and clone all target forks into provided directory at the target commit.
 
-# usage ./clone_forks_from_json.sh OUT_DIR forks.json
-#       ./collect_forks.py --token token.asc URL | ./clone_forks_from_json.sh OUT_DIR
+# usage ./clone_forks.py OUT_DIR forks.json
+#       ./collect_forks.py --token token.asc URL | ./clone_forks.py OUT_DIR
 
 import sys
 from pathlib import Path

teach_auto/collect_forks.py

-#!/use/bin/env python3
-# Collect all group-owned forks of a given project using Gitlab API
+#!/usr/bin/env python3
+# Collect all forks of a given project using Gitlab API
 # Forks metadata is sent to stdout and contains the following fields:
 # - id (gitlab identifier)
 # - url

teach_auto/create_groups.py

+#!/usr/bin/env python3
 # Given an input csv file of course participants created from moodle,
 # create corresponding groups in moodle.
 

teach_auto/invite_students.py

+#!/usr/bin/env python3
 # Given an input csv file of course participants created from moodle,
 # create corresponding groups in moodle.