document the row type returned by gproc:table/N

[qwfy]

Currently, one cannot know (without trying or digging the source code) what's the type of Row in qlc:e(qlc:q([Row || Row <- gproc:table()])), should this be documented?

[uwiger]

I agree that it should be clarified. Currently, one can infer it from the documentation of gproc:select/2.

That is: gproc defines a logical view of the registry as [{Key, Pid, Value}].