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/runpy.py b/Lib/runpy.py
index dc350cf..b0129c9 100755
--- a/Lib/runpy.py
+++ b/Lib/runpy.py
@@ -98,7 +98,7 @@
 if __name__ == "__main__":
     # Run the module specified as the next command line argument
     if len(sys.argv) < 2:
-        print >> sys.stderr, "No module specified for execution"
+        print("No module specified for execution", file=sys.stderr)
     else:
         del sys.argv[0] # Make the requested module sys.argv[0]
         run_module(sys.argv[0], run_name="__main__", alter_sys=True)