Damien Lespiau authored Jun 17, 2014 and Jani Nikula committed Jun 17, 2014

The "usage" text should explain it all. I found, in my quilt series
handling endeavours, that I wanted to be able to shift the prefix
numbers of a patch series.

v2: Use heredoc for usage string, fix second example, use mv -i (Jani)
v3: Don't use a fancy read for usage() (Jani)
    Collect the files to rename in a first pass, or the renaming process
    can interfere with listing the next files to rename
v4: Require bash (Jani)

Looks-good-to: Jani Nikula <jani.nikula@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>