* diagnostic.h (output_clear_message_text): New function.
	(output_message_text): New macro.

	* diagnostic.c (clear_text_info): Rename to
	output_clear_message_text.
	(output_clear): Adjust.
	(output_finish): Rename to output_finalize_message.  Tweek.
	(output_to_stream): Adjust.

From-SVN: r36658