citation.pyx: don't return false positives based on path

[jhpalmieri]

If you build Sage in a path containing "numpy", then get_systems in citation.pyx will think that numpy is used in every command, because it does a regular expression search for "numpy" using full pathnames. The attached patch replaces SAGE_ROOT with an empty string, to avoid such false positives.

To test, move an existing Sage installation to /tmp/numpy/sage-4.6.alpha3/, doctest citation.pyx, apply the patch and doctest again. (Other strings which will trigger a failure: scipy, _libsingular, _flint; see the full list at the top of misc/citation.pyx.)

CC: @mwhansen

Component: misc

Author: John Palmieri

Reviewer: Mike Hansen

Merged: sage-4.6.1.alpha0

Issue created by migration from https://trac.sagemath.org/ticket/10129

[jhpalmieri]

Attachment: trac_10129-get-systems.patch.gz

[mwhansen]

comment:2

Looks good to me.

[jdemeyer]

comment:3

Mike: It would be good to add your real name to the Sage Trac wiki at http://trac.sagemath.org/sage_trac/

[jdemeyer]

Reviewer: Mike Hansen

[jdemeyer]

Merged: sage-4.6.1.alpha0