…entional-changelog#3190)

When parsing `.git/COMMIT_EDITMSG` use the `core.commentChar` git
setting if present, falling back to the default comment char `#`
otherwise.

Use the `parserOpts.commentChar` setting only when parsing other
messages (e.g. from stdin.)

…g#3190)

- Remove useless change to test git repository setup
- Add comment on git config error handling

…hangelog#3190)

- Don't apply global changes
- Set $HOME to ensure default global settings aren't picked up