Experimental lexer generator: generate code for utf-16 character classes.

tools/lexer_generator/transition_key_test.py

Index: tools/lexer_generator/transition_key_test.py
diff --git a/tools/lexer_generator/transition_key_test.py b/tools/lexer_generator/transition_key_test.py
index 3180b02052b5e31070e4e38e6c6828ab67ba6f0e..18ccc71be252efc013a52e6003fc9b35aa764200 100644
--- a/tools/lexer_generator/transition_key_test.py
+++ b/tools/lexer_generator/transition_key_test.py
@@ -51,7 +51,7 @@ class TransitionKeyTestCase(unittest.TestCase):
       ("1-2", "12", "ab"),
       ("a-zA-Z", "abyzABYZ" , "123"),
       ("a-zA-Z0g" , "abyzABYZ0" , "123"),
-      ("a-z:ws::lit:" , "abc" , "123"),
+      ("a-z:whitespace::letter:" , "abc" , "123"),
     ]
     classes = {}
     for (string, match, no_match) in data: