Question: document mode: expanded output differs from colapsed. Why?

Please, take a look at the following work sheet for maple 11.01: View 6742_test.mw on MapleNet or Download 6742_test.mw It contains two similar documents blocks with functional operator assignments: f:= proc (x) options operator, arrow; 3*x end proc and g := proc (y) options operator, arrow; 3*y end proc One is collapsed another is not and this is the only principal difference between them. Now the output in collapsed document block is x -> 3 x while in expanded g := y -> 3 y. See additional "g := " which is absent in the first place. Why is this difference? Thank you very much, in advance.
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