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[Basic] getColumnNumber returns location of CR+LF on Windows

Authored by chh on Apr 6 2017, 11:36 AM.

Description

[Basic] getColumnNumber returns location of CR+LF on Windows

When fixing a Clang-Tidy bug in D31406,
reuse of FileID enabled the missing highlightRange function.
Assertion in highlightRange failed because the end-of-range column
number was 2 + the last column of a line on Windows.
This fix is required to enable D31406.

Differential Revision: https://reviews.llvm.org/D31713

llvm-svn: 299681