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* The plugin's search source is now off by default, so Trac searches will not include
source code results unless the user explicitly checks the "Source Repository" box
on the search form. This way the plugin won't impact performance of searches unless
the user actually wants to search through source code. (This behavior may change
in the future, but not until there exists a search backend that's faster than unindexed
full text search on a database column.)