* xw/am-empty (2021-12-07) 3 commits

The alias of my name should be "pwxu" but not "xw".

 - am: support --allow-empty to record specific empty patches
 - am: support --empty=<option> to handle empty patches
 - doc: git-format-patch: describe the option --always

 "git am" learns "--empty=(die|drop|keep)" option to tweak what is

This should be 'learns "--empty=(stop|drop|keep)"'

 done to a piece of e-mail without a patch in it.

 Almost there.
 source: [ref]