Rearange sentence on recommendation of @jacobian
diff --git a/docs/fernet.rst b/docs/fernet.rst
index 2fe2b86..4e94e21 100644
--- a/docs/fernet.rst
+++ b/docs/fernet.rst
@@ -3,9 +3,9 @@
.. currentmodule:: cryptography.fernet
-`Fernet`_ is an implementation of symmetric (also known as "secret key")
-authenticated cryptography. Fernet provides guarantees that a message encrypted
-using it cannot be manipulated or read without the key.
+Fernet provides guarantees that a message encrypted using it cannot be
+manipulated or read without the key. `Fernet`_ is an implementation of
+symmetric (also known as "secret key") authenticated cryptography.
.. class:: Fernet(key)