 Return indices of strings in buffer matched by regex in the
-- given region.
regexRegionB :: SearchExp -> Region -> BufferM [Region]
regexRegionB regex region = queryBuffer $ regexRegionBI regex region

--
regexRegionB :: SearchExp -> Region -> BufferM [Region]
regexRegionB regex region = queryBuffer $ regexRegionBI regex region
regexRegionB regex region = queryBuffer $ regexRegionBI regex region