$ 2to3 example.py
A diff against the original source file is printed. 2to3 can also write the
-needed modifications right back to the source file. (Of course, a backup of the
-original is also be made unless :option:`-n` is also given.) Writing the
-changes back is enabled with the :option:`-w` flag::
+needed modifications right back to the source file. (A backup of the original
+file is made unless :option:`-n` is also given.) Writing the changes back is
+enabled with the :option:`-w` flag::
$ 2to3 -w example.py