A few more docs fixes
diff --git a/docs/hazmat/backends/interfaces.rst b/docs/hazmat/backends/interfaces.rst
index 050d69f..ce2f091 100644
--- a/docs/hazmat/backends/interfaces.rst
+++ b/docs/hazmat/backends/interfaces.rst
@@ -197,8 +197,7 @@
         :returns: ``True`` if the specified ``algorithm`` is supported for
             PBKDF2 HMAC by this backend, otherwise ``False``.
 
-    .. method:: derive_pbkdf2_hmac(self, algorithm, length, salt, iterations,
-                                   key_material)
+    .. method:: derive_pbkdf2_hmac(self, algorithm, length, salt, iterations, key_material)
 
         :param algorithm: An instance of a
             :class:`~cryptography.hazmat.primitives.interfaces.HashAlgorithm`