TV prints usually edit the scene at the end where the ghost (after getting exhaust smoke blown on him from Porky's car) is left in blackface and says a la Rochester "My oh my! Tattletale grey!". Some TV stations remove this scene altogether (by either ending the short after Porky drives away, ignoring the ghost or by ending the short the split-second his car blows exhaust pipe on the ghost), whereas others (which broadcast the redrawn version of this cartoon, which already has the following edit), have the ghost's body colored purple instead of black.
Source: The Censored Cartoons Page (<http://looney.goldenagecartoons.com/ltcuts/i-j/>)