fix GUI I/O when Return is typed in the middle of the editor (merge into 4.1.4)
fix GUI I/O when Return is typed in the middle of the editor (merge into 4.1.4)

svn: r13211

mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket,mafagafogigante/racket