You should combine these 2 lines into 1 and put it on the same line as the first """. Also remove the ending ".". For example:

<pre>
"""Returns a list of plugins that are supported by the users OS as detected by python's sys.platform library

More stuff here
</pre>

This is because the first line of a docstring is a short summery of what the command should do. It should be very brief. If necessary after a blank line add a long description then your parameter list / return list at the end.

If you don't format this way then programs that autogenerate the docs won't look quite right.