[PATCH] Revamp indentation behavior for complex binary expressions.

[Daniel Jasper]

Hi klimek,

The idea is to indent according to operator precedence and pretty much
identical to how stuff would be indented with parenthesis.

Before:
    bool value = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +
                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +
                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==
                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *
                 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb +
                 bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb &&
                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *
                 aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >
                 ccccccccccccccccccccccccccccccccccccccccc;

After:
      bool value = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +
                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa +
                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa ==
                       aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *
                               bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb +
                           bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb &&
                   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa *
                           aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa >
                       ccccccccccccccccccccccccccccccccccccccccc;

http://llvm-reviews.chandlerc.com/D631

Files:
  lib/Format/Format.cpp
  lib/Format/TokenAnnotator.cpp
  lib/Format/TokenAnnotator.h
  unittests/Format/FormatTest.cpp
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