scala/scala — pull request #1419 by som-snytt (2012-09-28 17:56:36+00:00)
Title: PluginComponent contributes description to -Xshow-phases. (Fixes SI-6446)

In Global, SubComponent is called a phase descriptor, but it doesn't
actually have a description. (Phase itself does.) This fix adds
a description to PluginComponent so that plugins can describe what
they do in -Xshow-phases.