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/imputil.py b/Lib/imputil.py
index c3d1acd..1472d9c 100644
--- a/Lib/imputil.py
+++ b/Lib/imputil.py
@@ -618,9 +618,9 @@
     items.sort()
     for name, module in items:
         if module:
-            print name, module.__dict__.get('__importer__', '-- no importer')
+            print(name, module.__dict__.get('__importer__', '-- no importer'))
         else:
-            print name, '-- non-existent module'
+            print(name, '-- non-existent module')
 
 def _test_revamp():
     ImportManager().install()