commands: wrap docstrings at 70 characters
It is no longer necessary to wrap the docstrings at 70 characters in the source -- with the reST parser, they are re-formatted to fit the terminal when shown. However, wrapping the docstrings at 78 characters makes life harder for translators because it marks a lot of strings as fuzzy for no good reason. When un-marking them, the translators would have to examine each string again and determine if it is merely re-wrapped or if the content was also changed. The long lines also introduce very ugly linebreaks in the .po files if they are processed using the standard Gettext tools without using something like '--width 85' all the time.
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