* include/bits/forward_list.h (splice_after): Use forward.

	* include/bits/forward_list.h (splice_after): Use forward.
	(merge): Likewise.
	* include/bits/stl_iterator.h (move_iterator::operator*): Use move.
	(move_iterator::operator[]): Use move.
	* include/bits/stl_list.h (insert): Use move.
	* include/std/thread (_Callable constructor): Use forward.
	* include/std/tuple: Don't specify explicit template args to move.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@150326 138bc75d-0d04-0410-961f-82ee72b054a4