bug in error message (no template)

When using a template item in the URL (for SVN), the error message is not formatted appropriately:

    ==> bloom-export-upstream http://svn.pointclouds.org/pcl/tags/pcl-:{version}/ svn --tag :{none} --display-uri http://svn.pointclouds.org/pcl/tags/pcl-1.6.0/ --name upstream --output-dir /tmp/tmps0kl2Y
    Checking out repository at 'http://svn.pointclouds.org/pcl/tags/pcl-1.6.0/'.
    svn: URL 'http://svn.pointclouds.org/pcl/tags/pcl-:%7Bversion%7D' doesn't exist
    Failed to clone repository at 'http://svn.pointclouds.org/pcl/tags/pcl-:{version}/'.
    <== Error running command 'bloom-export-upstream http://svn.pointclouds.org/pcl/tags/pcl-:{version}/ svn --tag :{none} --display-uri http://svn.pointclouds.org/pcl/tags/pcl-1.6.0/ --name upstream --output-dir /tmp/tmps0kl2Y'