* dcache.c (dcache_hit, dcache_read_line): Tweak comments.

	* dcache.c (dcache_hit, dcache_read_line): Tweak comments.
	(dcache_peek_byte, dcache_init, dcache_xfer_memory): Ditto.
	* target.c (memory_xfer_partial): Tweak comments.
	(target_xfer_partial, target_write_memory): Add comment.
	(target_read_partial): Remove note from 2003-10-21.
	(target_read, target_write): Add comments.