* include/debug/forward_list (forward_list::splice_after): Check
	allocators are equal.
	* src/c++11/debug.cc: Fix spelling.
	* testsuite/23_containers/forward_list/debug/splice_after5_neg.cc:
	New.
	* testsuite/23_containers/forward_list/debug/splice_after6_neg.cc:
	Likewise.
	* testsuite/23_containers/forward_list/debug/splice_after7_neg.cc:
	Likewise.

From-SVN: r186669