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	and SYNTAX_ERROR2. Replace `' in messages with ''.
	(op_to_str): Make re-entrant.
	(_cpp_parse_expr): Implement new error macros. Use | rather
	than || to logically or 2 boolean integers.  Simply expression
	checking we have a left operand iff needed.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32890 138bc75d-0d04-0410-961f-82ee72b054a4