Description of problem:
In man, option --copy-devices is not present (compared to help).
In help, option --checksum-seed is not present (compared to man).
You can find proposed patch in attachment.
This report originates from https://bugzilla.redhat.com/show_bug.cgi?id=854923 .
Created attachment 7976 [details]
There is no such option as --copy-devices currently in rsync (there is a patch for that, but it's a crude patch that doesn't update docs in any way).
The --checksum-seed option hasn't been in --help on purpose, since it's a more advanced option that I thought might be best left to the fuller descriptions possible in the manpage. However, in the interest of making --help more accurate I added it.
Aside: the rsync.1 file is a generated file, and is not patched (its .yo file should be patched).