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Commit 9a26a7ec authored by Sjoerd Meijer's avatar Sjoerd Meijer
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[FileCheck] regexp doc update/fix 

Minor doc update that the FileCheck matcher supports POSIX ERE.
It also fixes a minor issue in the regexp describing a variable
name: underscores are allowed too.

Differential Revision: https://reviews.llvm.org/D38787

llvm-svn: 315679
parent d029234f
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