absorb: update help text...
absorb: update help text
Update the help text to reflect the recent changes to absorb in D4999.
The `-p` option actually only affects the `-a` option: without `-a`, the
changes are printed; with `-a` the changes are only printed if `-p` is
specified. Reword the help text for `-p` to reflect this.
Differential Revision:
https://phab.mercurial-scm.org/D5022