allow underscore and capitals in Github token (#778)

Author: bazile-clyde

etc/make_release.py

@@ -524,7 +524,7 @@ def read_github_creds(github_token_file):
     Read the GitHub token from the specified file and return it as a string.
     """
 
-    token_re = re.compile('^(?:Token - )?(?P<tok>[0-9a-f]{40}).*$')
+    token_re = re.compile('^(?:Token - )?(?P<tok>\w{40}).*$')
     github_token = None
 
     with open(github_token_file, 'rb') as token_stream: