[PATCH] D19703: [clang-tidy] Improve misc-redundant-expression and decrease false-positive

[Etienne Bergeron via cfe-commits]

etienneb updated this revision to Diff 55526.
etienneb added a comment.

adding unittests


http://reviews.llvm.org/D19703

Files:
  clang-tidy/misc/RedundantExpressionCheck.cpp
  docs/clang-tidy/checks/misc-redundant-expression.rst
  test/clang-tidy/misc-redundant-expression.cpp

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