Make a better Categories string for the block page.
Make a better Categories string for the block page.

unixabg/redwood,yinheli/redwood-filter,unixabg/redwood,yinheli/redwood-filter,andybalholm/redwood,vishnuvaradaraj/redwood,vishnuvaradaraj/redwood,yinheli/redwood-filter,vishnuvaradaraj/redwood,andybalholm/redwood