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.)
diff --git a/Lib/this.py b/Lib/this.py
index 37754b7..e68dd3f 100644
--- a/Lib/this.py
+++ b/Lib/this.py
@@ -25,4 +25,4 @@
     for i in range(26):
         d[chr(i+c)] = chr((i+13) % 26 + c)
 
-print "".join([d.get(c, c) for c in s])
+print("".join([d.get(c, c) for c in s]))