A typo

[Olivier Ramare <ramare@gat.univ-lille1.fr>]

In gp.2.0.5, the line "?\" followed by return is said incomplete...
Adding the semi-colon ";" on the new line yields the result, but see the
extra "?" that is put after the new prompt ! The line "?\;" followed
by return yields what was expected. (But "?." and "?" work just fine).
No need for an immediate patch, it is only to be cured someday.
Amities,
        Olivier