Merge branch 'am/pathspec-f-f-checkout'

A few more commands learned the "--pathspec-from-file" command line option. * am/pathspec-f-f-checkout: checkout, restore: support the --pathspec-from-file option doc: restore: synchronize <pathspec> description doc: checkout: synchronize <pathspec> description doc: checkout: fix broken text reference doc: checkout: remove duplicate synopsis add: support the --pathspec-from-file option cmd_add: prepare for next patch