[PATCH] D16529: [clang-tidy] Add modernize-raw-string-literal check

[Richard via cfe-commits]

LegalizeAdulthood created this revision.
LegalizeAdulthood added a reviewer: alexfh.
LegalizeAdulthood added a subscriber: cfe-commits.

This check examines string literals and looks for those that could be more directly expressed as a raw string literal.

Example:

```
char const *const BackSlash{"goink\\frob"};
```

becomes:

```
char const *const BackSlash{R"(goink\frob)"};
```

Addresses PR24444

http://reviews.llvm.org/D16529

Files:
  clang-tidy/modernize/CMakeLists.txt
  clang-tidy/modernize/ModernizeTidyModule.cpp
  clang-tidy/modernize/RawStringLiteralCheck.cpp
  clang-tidy/modernize/RawStringLiteralCheck.h
  docs/clang-tidy/checks/list.rst
  docs/clang-tidy/checks/modernize-raw-string-literal.rst
  test/clang-tidy/modernize-raw-string-literal.cpp

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