2013-09-28  Tim Shen <timshen91@gmail.com>

	* include/bits/regex_scanner.tcc (_Scanner<>::_M_eat_escape_posix):
	Let ordinary char escaping in POSIX be valid.
	* testsuite/28_regex/basic_regex/ctors/basic/raw_string.cc: Test this
	change.

From-SVN: r203005