Fix unicode.rsplit()'s bug that ignores separater on the end of string when
using specialized splitter for 1 char sep.
diff --git a/Lib/test/string_tests.py b/Lib/test/string_tests.py
index c3e53ad..eafc89a 100644
--- a/Lib/test/string_tests.py
+++ b/Lib/test/string_tests.py
@@ -208,6 +208,8 @@
         self.checkequal(['a\x00b', 'c'], 'a\x00b\x00c', 'rsplit', '\x00', 1)
         self.checkequal(['', ''], 'abcd', 'rsplit', 'abcd')
         self.checkequal([u'a b', u'c', u'd'], 'a b c d', 'rsplit', u' ', 2)
+        self.checkequal(['', ' endcase'], '| endcase', 'rsplit', '|')
+        self.checkequal(['', ' endcase'], 'test endcase', 'rsplit', 'test')
 
     def test_strip(self):
         self.checkequal('hello', '   hello   ', 'strip')