tests: fix PYTHONPATH manipulation on Windows
Without the semicolon separator and quotes, the variables ends up like this:
c:\Users\Matt\projects\hg-evolve:c:\Users\Matt\projects\hg-evolve:
c:\Users\Matt\projects\hg;c:\Users\Matt\projects\hg-evolve\tests;
c:\Users\Matt\projects\hg\tests
That in turn makes the local evolve code unreachable, and the system installed
code is tested instead.
I'm testing against `uname` instead of a trivial python script printing os.name
because maybe one day tests will run on WSL.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
^tests/.*\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes
^docs/training/graphs/
^docs/training/html/
^docs/training/index.html
^docs/training/graphviz-images/
^docs/training/img/
^docs/training/output/
^docs/training/pandocfilters/