Add space.

Author: terryjreedy

Lib/idlelib/editor.py

@@ -1014,7 +1014,7 @@ def saved_change_hook(self):
             title = short + " - " + long + _py_version
         elif short:
             if short == "IDLE Shell":
-                title = short + platform.python_version()
+                title = short + " " +  platform.python_version()
             else:
                 title = short + _py_version
         elif long: