Consistently use e.g.
diff --git a/cryptography/hazmat/primitives/interfaces.py b/cryptography/hazmat/primitives/interfaces.py
index d4466e7..da4fa20 100644
--- a/cryptography/hazmat/primitives/interfaces.py
+++ b/cryptography/hazmat/primitives/interfaces.py
@@ -29,7 +29,7 @@
     @abc.abstractproperty
     def name(self):
         """
-        A string naming this mode.  (ex. ECB, CBC)
+        A string naming this mode.  (e.g. ECB, CBC)
         """
 
 
@@ -81,7 +81,7 @@
     @abc.abstractproperty
     def name(self):
         """
-        A string naming this algorithm. (ex. sha256, md5)
+        A string naming this algorithm. (e.g. sha256, md5)
         """
 
     @abc.abstractproperty