[PATCH] Fix bug in clang-format while merging short function (PR19461)

[Dinesh Dwivedi]

Updated as per review comments.

I have moved 'I[1]->First->MustBreakBefore' check to line 535. I agree that this is good as there are other check for I[1] but this check is actually required in context at for block of lines 554:570. For lines between 535:554, it is redundant check as this condition is already being checked in tryMergeSimpleBlock().

http://reviews.llvm.org/D3439

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