A reporter that prints a dot per file, followed by details at the end.

Inspecting 27 files.

.....X..........X..........

27 files, 2 errors!

== lib/dogma/rules.ex ==
23: TrailingBlankLines: Blank lines detected at end of file

== test/dogma/formatter_test.exs ==
9: TrailingWhitespace: Trailing whitespace detected [33]