creating a failing test for #715
add etalon data for named prefixes test
fix etalon data
fix bug with duplicated multiple named prefixes
Merge pull request #732 from hd-deman/failing-test

creating a failing test for #715
Introduce a ViolationFormatter
fix CS
Remove unused code in tests
Merge pull request #734 from pyrech/violation_formatter

Introduce a ViolationFormatter
work around api limits
Merge remote-tracking branch 'FOS/master'