http://github.com/<username>/<project>/commits/<branch>/<path/to/file>
instead of
http://github.com/<username>/<project>/tree/<branch>/<path/to/file>
— from Stackoverflow answer.
See also
http://github.com/<username>/<project>/commits/<branch>/<path/to/file>
instead of
http://github.com/<username>/<project>/tree/<branch>/<path/to/file>
— from Stackoverflow answer.
See also