Corrected style of comments (issue 5862052)

[milimetr88]

Reviewers: ,

Message:
This is a continuation of Issue: http://codereview.appspot.com/5651069/

Description:
Corrected style of comments

Please review this at http://codereview.appspot.com/5862052/

Affected files:
  M .gitignore
  M flower/include/direction.hh
  M lily/accidental-placement.cc
  M lily/grob.cc
  M lily/include/grob-interface.hh
  M lily/include/note-collision.hh
  M lily/note-collision.cc
  M lily/note-column.cc
  M lily/staff-symbol-referencer.cc