LWG Issue 2210 (Part #2 & #3): list and forward_list

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@190279 91177308-0d34-0410-b5e6-96231b3b80d8
Fix minor type-o in tests.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@190280 91177308-0d34-0410-b5e6-96231b3b80d8
Remove a tab that snuck in

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@190283 91177308-0d34-0410-b5e6-96231b3b80d8