PR preprocessor/57620
	* lex.c (lex_raw_string): Undo phase1 and phase2 transformations
	between R" and final " rather than only in between R"del( and )del".

	* c-c++-common/raw-string-2.c (s12, u12, U12, L12): Remove.
	(main): Don't test {s,u,U,L}12.
	* c-c++-common/raw-string-13.c: New test.
	* c-c++-common/raw-string-14.c: New test.
	* c-c++-common/raw-string-15.c: New test.
	* c-c++-common/raw-string-16.c: New test.

From-SVN: r201091