fix and test a show method

Author: jwahlstrand

src/text.jl

@@ -31,7 +31,7 @@ function GtkTextIter(text::GtkTextBuffer, mark::GtkTextMark)
     Ref(i)
 end
 
-show(io::IO, iter::_GtkTextIter) = println("_GtkTextIter($(iter.offset) ))")
+show(io::IO, iter::_GtkTextIter) = print("_GtkTextIter($(G_.get_offset(Ref(iter))))")
 
 
 #"""

test/text.jl

@@ -18,6 +18,7 @@ push!(w, v)
 
 its = GtkTextIter(b, 1)
 ite = GtkTextIter(b, 2)
+show(its)
 
 @test buffer(its) == b
 @test (its:ite).text == "t"