* include/bits/forward_list.h (forward_list): Adjust comments.

	* include/bits/forward_list.h (forward_list): Adjust comments.
	(forward_list(const forward_list&, const _Alloc&)): Use
	_M_range_initialize to copy elements.
	(forward_list(forward_list&&, const _Alloc&)): Add exception
	specification.
	(_Fwd_list_base(const _Fwd_list_base&, const _Node_alloc_type&)):
	Remove.
	* include/bits/forward_list.tcc (_Fwd_list_base(const _Fwd_list_base&,
	const _Node_alloc_type&)): Remove.
	(_Fwd_list_base(_Fwd_list_base&&, const _Node_alloc_type&)): Fix
	memory leak when allocators are not equal.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@193009 138bc75d-0d04-0410-961f-82ee72b054a4