coding-standard.xhtml describes old copyright header format

[ivank]

http://twistedmatrix.com/trac/browser/trunk/doc/core/development/policy/coding-standard.xhtml?format=raw says:

# Copyright (c) 2009 Twisted Matrix Laboratories.
# See LICENSE for details.


    When you update existing files, make sure the year in the copyright
    header is up to date as well. You should add a new copyright header when
    it's completely missing in the file that is being edited.

We don't have years in the copyright headers any more.

[exarkun]

(In [31925]) Branching to 'copyright-policy-5112'

[exarkun]

Thanks for pointing that out. Fix is in the branch.

[ivank]

1. Please fix "including the year the file was added" as well.

Otherwise, looks good.

[exarkun]

(In [31930]) Oops, remove the other year-related recommendation

refs #5112

[exarkun]

(In [31931]) Merge copyright-policy-5112

Author: exarkun Reviewer: ivank Fixes: #5112

Remove the recommendation to include the year in copyright headers, matching what we currently actually want to do with respect to these. See #4857.