Improve usage info in docstrings

[foundrytom]

What

Improve the docstring generation so that it'd doesn't butt usage up below the last line of the description.

Why

     still be presented with standard Host UI for the type as an
     option.
      * If  the "exclusive" property is set to true, then the Manager
        takes exclusive control over data with the queried trait set,
        and any standard host interfaces etc should be suppressed.
 Usage: managementPolicy

Its a bit hard to grok, some whitespace, or moving before the body text might help?