diff --git a/django/db/models/expressions.py b/django/db/models/expressions.py
index b84398d9ce..38b656162d 100644
--- a/django/db/models/expressions.py
+++ b/django/db/models/expressions.py
@@ -15,10 +15,9 @@ class ExpressionNode(tree.Node):
     MUL = '*'
     DIV = '/'
     POW = '^'
-    # This is a quoted % operator - it is quoted
-    # because it can be used in strings that also
-    # have parameter substitution.
-    MOD = '%%'
+    MOD = '%%'  # This is a quoted % operator - it is quoted
+                # because it can be used in strings that also
+                # have parameter substitution.
 
     # Bitwise operators - note that these are generated by .bitand()
     # and .bitor(), the '&' and '|' are reserved for boolean operator