Format of GHC.Stack.CCS.InfoProv.ipDesc

When using GHC.Stack.CCS.whereFrom to get info table information for a heap object, you get something that looks like the following:

InfoProv {ipName = "BitmapIndexed_Types.RR_3_con_info", ipDesc = "5", ipTyDesc = "HashMap", ipLabel = "unsafeInsert.go", ipMod = "Types.RR", ipLoc = "Data/HashMap/Internal.hs:902:13-18"}

Most of these fields are human readable except for the ipDesc field. This corresponds to the ClosureType of the heap object. It would be good if this function gave us a pretty printed version of the closure type, eg, CONSTR_1_1, rather than the enum index. Or it would be good to document this.

I'd be happy to make an MR in either case.