➜ task -- email-messages update blah --lmx "<H1>hello</H1>"

   ERROR

  At least one of the flags in the group [expected-revision-id force] is required.

exit status 1
task: Failed to run task "default": exit status 1

➜ task -- email-messages update blah --lmx "<H1>hello</H1>" -r blah
Updated.
...

➜ task -- email-messages update blah --lmx "<H1>hello</H1>" --force
Updated.
...

➜ task -- email-messages update blah --lmx "<H1>hello</H1>" -r blah -f

   ERROR

  If any flags in the group [expected-revision-id force] are set none of the others can be; [expected-revision-id force] were all set.