Re-work some existing command_line tests to include the return status also.
Re-work some existing command_line tests to include the return status also.

larsbutler/coveragepy,larsbutler/coveragepy,7WebPages/coveragepy,7WebPages/coveragepy,blueyed/coveragepy,larsbutler/coveragepy,7WebPages/coveragepy,nedbat/coveragepy,hugovk/coveragepy,nedbat/coveragepy,nedbat/coveragepy,hugovk/coveragepy,nedbat/coveragepy,jayhetee/coveragepy,jayhetee/coveragepy,larsbutler/coveragepy,jayhetee/coveragepy,jayhetee/coveragepy,blueyed/coveragepy,hugovk/coveragepy,blueyed/coveragepy,larsbutler/coveragepy,hugovk/coveragepy,blueyed/coveragepy,nedbat/coveragepy,hugovk/coveragepy,7WebPages/coveragepy,jayhetee/coveragepy,blueyed/coveragepy