public ConfigController::diff($source_name, $target_name = NULL, $collection = NULL)
Shows diff of specified configuration file.
Parameters
string $source_name: The name of the configuration file.
string $target_name: (optional) The name of the target configuration file if different from the $source_name.
string $collection: (optional) The configuration collection name. Defaults to the default collection.
Return value
string Table showing a two-way diff between the active and staged configura