how to specify multi-line version description from cli?

[Douglas Hunley]

If using `vagrant cloud publish` how do you specify multi-line values for --version-description? If I have my changes in a file (changes.md) like:

* update kernel to <version>

* change default value of <foo> to <bar>

do i just point it at the file: --version-description changes.md ?

do i tell it to do something like: --version-description $(cat changed.md) ?

something else?

thx!