Move `backend` argument in Scrypt documentation (#5027)

Move the `backend` argument up with the rest of the constructor
arguments, otherwise it's easy to miss it.

1 files changed, 2 insertions, 3 deletions

diff --git a/docs/hazmat/primitives/key-derivation-functions.rst b/docs/hazmat/primitives/key-derivation-functions.rst
index fe9f0b0d..40a0c3db 100644
--- a/docs/hazmat/primitives/key-derivation-functions.rst
+++ b/docs/hazmat/primitives/key-derivation-functions.rst
@@ -789,6 +789,8 @@ Different KDFs are suitable for different tasks such as:
         power of 2.
     :param int r: Block size parameter.
     :param int p: Parallelization parameter.
+    :param backend: An instance of
+        :class:`~cryptography.hazmat.backends.interfaces.ScryptBackend`.
 
     The computational and memory cost of Scrypt can be adjusted by manipulating
     the 3 parameters: ``n``, ``r``, and ``p``. In general, the memory cost of
@@ -802,9 +804,6 @@ Different KDFs are suitable for different tasks such as:
     minimum value of ``n=2**14`` for interactive logins (t < 100ms), or
     ``n=2**20`` for more sensitive files (t < 5s).
 
-    :param backend: An instance of
-        :class:`~cryptography.hazmat.backends.interfaces.ScryptBackend`.
-
     :raises cryptography.exceptions.UnsupportedAlgorithm: This is raised if the
         provided ``backend`` does not implement
         :class:`~cryptography.hazmat.backends.interfaces.ScryptBackend`