Support multiple git config values per option

[ajdavis]

No description provided.

[codecov-io]

Codecov Report

Merging #829 into master will decrease coverage by 0.59%.
The diff coverage is 93.07%.

@@ Coverage Diff @@## master #829 +/- ##
=========================================
- Coverage 94.79% 94.19% -0.6% 
=========================================
Files 59 59 Lines 9600 9507 -93 =========================================
- Hits 9100 8955 -145 - Misses 500 552 +52

Impacted Files	Coverage Δ
git/test/test_config.py	98.75% <100%> (+0.39%)	⬆️
git/config.py	91.5% <87.14%> (-1.05%)	⬇️
git/test/test_util.py	90.07% <0%> (-8.56%)	⬇️
git/test/test_base.py	96.42% <0%> (-2.44%)	⬇️
git/objects/submodule/base.py	92.89% <0%> (-1.61%)	⬇️
git/test/lib/helper.py	90.69% <0%> (-1.44%)	⬇️
git/test/test_submodule.py	97.89% <0%> (-1.36%)	⬇️
git/objects/tree.py	59.64% <0%> (-0.93%)	⬇️
git/repo/base.py	94.6% <0%> (-0.78%)	⬇️
git/test/test_repo.py	97.25% <0%> (-0.71%)	⬇️
... and 29 more

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[ajdavis]

OK, this pull request is ready to review. I believe that the AppVeyor failures in Python 3 predate this patch. I think the Travis failure is because the Travis config doesn't know how to run "TestRemote.test_base" on a pull request.

[Byron]

First of all: Sorry for the late reply! Thanks a ton for your contribution! I will merge it ASAP!

As you can imagine, maintenance of this repository is only sporadic, at best. However, if you are interested, I would love to make you a contributor in case you would like to look after it from time to time. I am usually available to make releases in a timely fashion per request.

[ajdavis]

Thanks for merging! I appreciate your work on this project very much but I don’t want to be a regular contributor.