git diff lines starting with two plus characters are handled as new files

[jongiddy]

The parsing in

coverage-reporter/coverage_reporter/filters/patch.py

Lines 36 to 40 in 18ecc91

	if line.startswith('+++'):
	# place marker - name of file
	# +++ <filename>
	new_file = line.split(None, 1)[1]
	new_file = new_file.split('\t', 1)[0]

reads any sequence of +++ as a file boundary. Since git diff puts a + at the start of new lines, and new line that starts with ++ will get treated as file boundary.

If the line contains no spaces, this leads to an error like:

Traceback (most recent call last):
  File "/srv/buildslave/flocker-coverage/venv/bin/coverage-reporter", line 5, in <module>
    __main__.main(sys.argv)
  File "/srv/buildslave/flocker-coverage/venv/lib/python2.7/site-packages/coverage_reporter/__main__.py", line 63, in main
    data = filter_coverage(data, plugins.get_filters())
  File "/srv/buildslave/flocker-coverage/venv/lib/python2.7/site-packages/coverage_reporter/__main__.py", line 36, in filter_coverage
    data = filter.filter(data)
  File "/srv/buildslave/flocker-coverage/venv/lib/python2.7/site-packages/coverage_reporter/filters/patch.py", line 13, in filter
    return filter_by_patch(coverage_data, self.patch, self.patch_level)
  File "/srv/buildslave/flocker-coverage/venv/lib/python2.7/site-packages/coverage_reporter/filters/patch.py", line 20, in filter_by_patch
    lines = _get_lines_from_patch(patch_file, patch_level)
  File "/srv/buildslave/flocker-coverage/venv/lib/python2.7/site-packages/coverage_reporter/filters/patch.py", line 40, in _get_lines_from_patch
    new_file = line.split(None, 1)[1]
IndexError: list index out of range

I haven't observed what happens if there is a space in the line, but it should be different to this IndexError.