jscheid/dtrt-indent — pull request #2 by saturday06 (2013-02-18 12:21:15+00:00)
Title: Search from dtrt-indent-hook-mapping-list using derived-mode-parent.

Maybe, using derived-mode-parent reduces maintenance costs.

eg)
html-mode's derived-mode-parent is sgml-mode.
scss-mode's derived-mode-parent is css-mode.