IDEA-102124 (quickfix name contains placeholder: Make 'XXX' not !default.visibility.presentation!)
Test extended
Common TypeInfo usage pattern in toString()'s
Test data fixed
Extract setting defaults to a separate method to make it more clear.

According to review comments from CR-IC-84
[vcs] style: updated all remaining fields with explicit initializers

For consistency. CR-IC-166
[vcs] Remove unused method.
[vcs] VcsConfiguration: fix spelling

This will change the xml tag, which will reset the
setting to its default value, but it is not critical for this
particular setting.
[vcs] Remove unused method, which was deprecated in 2006.
[hg] Tests: use hg executable from test data, if there is no hg in PATH