Code review comment for lp:~kgunn72/mir/add_xmir_debug_guide

"XMir is an addition to the system of Mir being employed as a system compositor under the X stack, effectively compositing the greeter and the desktop session."

I find this sentence hard to parse. Does it mean:

"XMir is separate from Mir and enables Mir to be employed as a system compositor under the X stack, in this configuration Mir composites the greeter and the desktop sessions."

Like Daniel I think the merge should be addressed before approving.