Fix typo in Gdk identifier

issue10882
review354241002
(grafted from ad169d67663af50ba14d203d891bdf040a975c56)

--HG--
branch : 6.0

tryton/gui/window/win_export.py

@@ -444,7 +444,7 @@ class WinExport(WinCSV):
             return True
 
     def export_keypress(self, treeview, event):
-        if event.keyval not in [Gdk.KEY_Return, Gdk.KEY_.space]:
+        if event.keyval not in [Gdk.KEY_Return, Gdk.KEY_space]:
             return
         model, selected = treeview.get_selection().get_selected()
         if not selected: