PEP 8: Replaced outdated usages of `print` as a statement (#2271)

pep-0008.txt

@@ -465,12 +465,12 @@ Avoid extraneous whitespace in the following situations:
 - Immediately before a comma, semicolon, or colon::
 
       # Correct:
-      if x == 4: print x, y; x, y = y, x
+      if x == 4: print(x, y); x, y = y, x
 
   ::
 
       # Wrong:
-      if x == 4 : print x , y ; x , y = y , x
+      if x == 4 : print(x , y) ; x , y = y , x
 
 - However, in a slice the colon acts like a binary operator, and
   should have equal amounts on either side (treating it as the