Teach doctest about newer "(most recent call last)" traceback spelling.

Lib/doctest.py

@@ -160,7 +160,7 @@ No problem, as long as the only output generated by the example is the
 traceback itself.  For example:
 
     >>> 1/0
-    Traceback (innermost last):
+    Traceback (most recent call last):
       File "<stdin>", line 1, in ?
     ZeroDivisionError: integer division or modulo by zero
     >>>
@@ -246,7 +246,7 @@ executed, leading to this output in verbose mode:
 Running doctest.__doc__
 Trying: 1/0
 Expecting:
-Traceback (innermost last):
+Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 ZeroDivisionError: integer division or modulo by zero
 ok
@@ -489,7 +489,8 @@ def _run_examples_inner(out, fakeout, examples, globs, verbose, name):
             state = OK
         except:
             # See whether the exception was expected.
-            if want.find("Traceback (innermost last):\n") == 0:
+            if want.find("Traceback (innermost last):\n") == 0 or \
+               want.find("Traceback (most recent call last):\n") == 0:
                 # Only compare exception type and value - the rest of
                 # the traceback isn't necessary.
                 want = want.split('\n')[-2] + '\n'

Lib/test/output/test_doctest

@@ -2,7 +2,7 @@ test_doctest
 Running doctest.__doc__
 Trying: 1/0
 Expecting:
-Traceback (innermost last):
+Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 ZeroDivisionError: integer division or modulo by zero
 ok