Various simplifications.
Various simplifications.

* tools/dev/histogram.py:
  (count): use .get() to simplify the counting
  (histogram): screw reduce(). just compute the max for the keys (author
    names) and the values (counts). use reverse=True to sorted() rather
    than a funky slice. alter the format and pass the column width instead
    of a funky multiplier on " ".


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1173224 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion