Slight speed-up in copy method

[gh-mjungmath]

We have for the copy method of tensor fields and sections currently the following code:

        resu = self._new_instance()
        for dom, rst in self._restrictions.items():
            resu._restrictions[dom] = rst.copy()
        resu.set_name(name=name, latex_name=latex_name)
        resu._is_zero = self._is_zero
        return resu

where resu.set_name(name=name, latex_name=latex_name) loops over all restrictions again. These two loops can be reduced to just one loop by passing name and latex_name to the restriction's copy-method.

[tscrim]

Green bot => you can set a positive review.

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New commits:

​a56ee0d

something

[tscrim]

Although your commit message also leaves something to be desired too.

[gh-mjungmath]

Oh yes. I actually wanted to amend the commit before pushing. :D

[tscrim]

Green bot, but please amend the commit before setting to a positive review.

[git]

Branch pushed to git repo; I updated commit sha1. This was a forced push. New commits:

​27c2fcb

Trac #31658: pass names to branched copy method

[gh-mjungmath]

There we go. Thank you for the review Travis!

[git]

Branch pushed to git repo; I updated commit sha1 and set ticket back to needs_review. New commits:

​b0240cc

Trac #31658: same change for copy_from

[gh-mjungmath]

Just noticed, the same change can be applied to copy_from making it faster, too. Sorry Travis!

[git]

Branch pushed to git repo; I updated commit sha1 and set ticket back to needs_review. This was a forced push. New commits:

​ffa35d9

Trac #31658: same change for copy_from

[gh-mjungmath]

Typo in code caused pyflakes error.