Fix most trivially-findable print statements.

There's one major and one minor category still unfixed:
doctests are the major category (and I hope to be able to augment the
refactoring tool to refactor bona fide doctests soon);
other code generating print statements in strings is the minor category.

(Oh, and I don't know if the compiler package works.)

Lib/idlelib/Delegator.py

@@ -23,7 +23,7 @@ class Delegator:
     def cachereport(self):
         keys = self.__cache.keys()
         keys.sort()
-        print keys
+        print(keys)
 
     def setdelegate(self, delegate):
         self.resetcache()