* include/bits/stl_vector.h (vector::_S_insert_aux_assign): Define
new overloaded functions.
* include/bits/vector.tcc (vector::_M_insert_aux): Use new functions
to avoid creating a redundant temporary.
* testsuite/23_containers/vector/modifiers/insert_vs_emplace.cc: New
test.
From-SVN: r237526
