Tweak re_tests and test_re to differentiate between

groups that have no value and groups that are out of bounds.

Lib/test/output/test_re

@@ -59,7 +59,7 @@ test_re
 ('()ef', 'def', 0, 'found+"-"+g1', 'ef-')
 === Syntax error: ('()ef', 'def', 0, 'found+"-"+g1', 'ef-')
 ('$b', 'b', 1)
-('a\\(b', 'a(b', 0, 'found+"-"+g1', 'a(b-None')
+('a\\(b', 'a(b', 0, 'found+"-"+g1', 'a(b-Error')
 ('a\\(*b', 'ab', 0, 'found', 'ab')
 ('a\\(*b', 'a((b', 0, 'found', 'a((b')
 ('a\\\\b', 'a\\b', 0, 'found', 'a\\b')

Lib/test/re_tests.py

@@ -34,8 +34,10 @@ benchmarks = [
 #         3: a string that will be eval()'ed to produce a test string.
 #            This is an arbitrary Python expression; the available
 #            variables are "found" (the whole match), and "g1", "g2", ...
-#            up to "g10" contain the contents of each group, or the
-#            string 'None' if the group wasn't given a value.
+#            up to "g99" contain the contents of each group, or the
+#            string 'None' if the group wasn't given a value, or the
+#            string 'Error' if the group index was out of range;
+#            also "groups", the return value of m.group() (a tuple).
 #         4: The expected result of evaluating the expression.
 #            If the two don't match, an error is reported.
 #
@@ -137,7 +139,7 @@ tests = [
  'found+"-"+g1', 'ef-'),
 ('$b', 'b', FAIL),
 ('a\\(b', 'a(b', SUCCEED,
- 'found+"-"+g1', 'a(b-None'),
+ 'found+"-"+g1', 'a(b-Error'),
 ('a\\(*b', 'ab', SUCCEED,
  'found', 'ab'),
 ('a\\(*b', 'a((b', SUCCEED,

Lib/test/test_re.py

@@ -48,7 +48,7 @@ for t in tests:
 			# Special hack because else the string concat fails:
 			if gi is None: gi = "None"
 		    except IndexError:
-			gi = "None"
+			gi = "Error"
 		    vardict['g%d' % i] = gi
 		repl=eval(repl, vardict)
 		if repl!=expected: