String method conversion.
(This one was trivial -- no actual string. references in it!)
diff --git a/Lib/test/test_pty.py b/Lib/test/test_pty.py
index 5ea7e6f..2a2d818 100644
--- a/Lib/test/test_pty.py
+++ b/Lib/test/test_pty.py
@@ -1,4 +1,4 @@
-import pty, os, sys, string
+import pty, os, sys
 from test_support import verbose, TestFailed, TestSkipped
 
 TEST_STRING_1 = "I wish to buy a fish license."