Fixing a very small bug in which a source block ends with `#+end_src
python` instead of `#+end_src`, prohibiting it from being recognized
as a source block.

The branch:
https://gitlab.com/yuvallanger/worg-mirror-unofficial/tree/fix-end-src-python

The commit:
https://gitlab.com/yuvallanger/worg-mirror-unofficial/commit/8f6214fe35199186f256c17cccecbd5a9a8063c7

Attached is the `git format-patch master` patch file while HEAD is
pointing at fix-end-src-python.

Many thanks,
Yuval Langer.