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/heapq.py

@@ -340,4 +340,4 @@ if __name__ == "__main__":
     sort = []
     while heap:
         sort.append(heappop(heap))
-    print sort
+    print(sort)