Improve the output even further

Actually, it is even better to simply output the actual lines that you can copy
and paste, so now the output is:

    $ hit fetch http://llvm.org/releases/3.4/libcxx-3.4.src.tar.gz
    Downloading http://llvm.org/releases/3.4/libcxx-3.4.src.tar.gz...
    Downloading 'http://llvm.org/releases/3.4/libcxx-3.4.src.tar.gz'
    [=========================] 100.0% (1.3MB of 1.3MB) 3.523MB/s ETA 0s

    sources:
    - url: http://llvm.org/releases/3.4/libcxx-3.4.src.tar.gz
      key: tar.gz:xwpsaatz6dvrt7bi5uwz2yd57u4ofz6z