DEBUG: Print out which repo

[pllim]

As suggested in #111 (comment)

[codecov-io]

Codecov Report

Merging #113 (41ecbff) into master (cf93ea5) will decrease coverage by 4.27%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
- Coverage   83.22%   78.94%   -4.28%     
==========================================
  Files          17       17              
  Lines         930      931       +1     
==========================================
- Hits          774      735      -39     
- Misses        156      196      +40     

Impacted Files	Coverage Δ
baldrick/blueprints/github.py	100.00% <100.00%> (ø)
baldrick/plugins/github_towncrier_changelog.py	39.28% <0.00%> (-47.62%)	⬇️

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[pllim]

Eh... How did this one print statement break the code?

        sys.platform.startswith('win'),
        reason='process_towncrier_changelog returns failure on Windows')
    def test_changelog_type_substring(self, app):
    
        self.get_file_contents.return_value = CUSTOM_TYPE_TEMPLATE
        self.modified_files.return_value = (['changelog/1234.docfix.rst'])
    
        with app.app_context():
>           messages = process_towncrier_changelog(self.pr_handler, self.repo_handler)

../../.tox/py38-test/lib/python3.8/site-packages/baldrick/plugins/tests/test_github_towncrier_changelog.py:88: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
../../.tox/py38-test/lib/python3.8/site-packages/baldrick/plugins/github_towncrier_changelog.py:130: in process_towncrier_changelog
    config = load_towncrier_config(pr_handler)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

pr_handler = <baldrick.github.github_api.PullRequestHandler object at 0x7fe467d89790>

    def load_towncrier_config(pr_handler):
        file_content = pr_handler.get_file_contents("pyproject.toml", branch=pr_handler.base_branch)
        config = loads(file_content)
        if "towncrier" in config.get("tool", {}):
>           return parse_toml(config)
E           TypeError: parse_toml() missing 1 required positional argument: 'config'

../../.tox/py38-test/lib/python3.8/site-packages/baldrick/plugins/github_towncrier_changelog.py:105: TypeError

[pllim]

Failure is caused by #105