Fix sage-coverage

Imported from <a href="http://trac.sagemath.org/sage_trac/ticket/14061">trac #14061</a>.



Reported by: jdemeyer

Component: scripts

CC: 

Report Upstream: N/A

Authors: Jeroen Demeyer

Dependencies: 

Work issues: 

Reviewers: Travis Scrimshaw

Merged in: sage-5.7.beta4

Attachments: <ol><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/14061/coverage.diff">coverage.diff: Diff of coverageall results</a> by jdemeyer at 20130205T17:07:32</li><li><a href="http://trac.sagemath.org/sage_trac/attachment/ticket/14061/coverage_using_tokens.patch">coverage_using_tokens.patch: </a> by jdemeyer at 20130205T20:54:56</li></ol>