The from_scratch option is called --from-scratch on the command line.
Fixed the documentation.
@@ -582,7 +582,7 @@ from_scratch
~~~~~~~~~~~~
Either ``yes`` or ``no`` (default), controlling whether existing metadata is
-discarded when a match is applied. This corresponds to the ``--from_scratch``
+discarded when a match is applied. This corresponds to the ``--from-scratch``
flag to ``beet import``.
.. _quiet:
