doctest doesn't handle intentional SyntaxError exceptions gracefully,

tim-one · tim-one · commit 08bba953eacd · 2001-06-24T06:46:58.000Z
because it picks up the first line of traceback.format_exception_only()
instead of the last line.  Pick up the last line instead!
diff --git a/Lib/doctest.py b/Lib/doctest.py
@@ -501,7 +501,7 @@ def _run_examples_inner(out, fakeout, examples, globs, verbose, name):
                 # the traceback isn't necessary.
                 want = want.split('\n')[-2] + '\n'
                 exc_type, exc_val, exc_tb = sys.exc_info()
-                got = traceback.format_exception_only(exc_type, exc_val)[0]
+                got = traceback.format_exception_only(exc_type, exc_val)[-1]
                 state = OK
             else:
                 # unexpected exception
