grammar nit, use a comma here (#4066)
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst
index aa577f0..126a918 100644
--- a/docs/hazmat/primitives/symmetric-encryption.rst
+++ b/docs/hazmat/primitives/symmetric-encryption.rst
@@ -136,7 +136,7 @@
concatenated with a block counter (encoded as a 32-bit
little-endian). If you have a separate nonce and block counter
you will need to concatenate it yourself before passing it. For
- example if you have an initial block counter of 2 and a 96-bit
+ example, if you have an initial block counter of 2 and a 96-bit
nonce the concatenated nonce would be
``struct.pack("<i", 2) + nonce``.