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/compiler/transformer.py

@@ -86,7 +86,7 @@ def Node(*args):
         try:
             return nodes[kind](*args[1:])
         except TypeError:
-            print nodes[kind], len(args), args
+            print(nodes[kind], len(args), args)
             raise
     else:
         raise WalkerError, "Can't find appropriate Node type: %s" % str(args)