- * - $wgTidyBin should be set to the path of the binary and
- * - $wgTidyConf to the path of the configuration file.
- * - $wgTidyOpts can include any number of parameters.
- * - $wgTidyInternal controls the use of the PECL extension or the
- * libtidy (PHP >= 5) extension to use an in-process tidy library instead
- * of spawning a separate program.
- * Normally you shouldn't need to override the setting except for
- * debugging. To install, use 'pear install tidy' and add a line
- * 'extension=tidy.so' to php.ini.
+ * Keys are:
+ * - driver: May be:
+ * - RaggettInternalHHVM: Use the limited-functionality HHVM extension
+ * - RaggettInternalPHP: Use the PECL extension
+ * - RaggettExternal: Shell out to an external binary (tidyBin)
+ *
+ * - tidyConfigFile: Path to configuration file for any of the Raggett drivers
+ * - debugComment: True to add a comment to the output with warning messages
+ * - tidyBin: For RaggettExternal, the path to the tidy binary.
+ * - tidyCommandLine: For RaggettExternal, additional command line options.