Use new resizing setslice in the Python interpreter
Now that list slices can resize (Issue #2196 ), we should refactor this kind of code: https://bitbucket.org/pypy/pypy/src/d4774974048860b281f9d7cdd7723e5da3e62092/pypy/objspace/std/listobject.py?at=default&fileviewer=file-view-default#listobject.py-1473
This is an easy task, suitable for getting started with pypy.
Attachments: patch-use-listslice-resizing-v01.diffpatch-use-listslice-resizing-v02.diff