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/lib-tk/FileDialog.py

@@ -267,7 +267,7 @@ def test():
     loadfile = fd.go(key="test")
     fd = SaveFileDialog(root)
     savefile = fd.go(key="test")
-    print loadfile, savefile
+    print(loadfile, savefile)
 
 
 if __name__ == '__main__':