tests: Add test for exception matching of a tuple of exceptions.

tests/basics/except_match_tuple.py

+# test exception matching against a tuple
+
+try:
+    fail
+except (Exception,):
+    print('except 1')
+
+try:
+    fail
+except (Exception, Exception):
+    print('except 2')
+
+try:
+    fail
+except (TypeError, NameError):
+    print('except 3')
+
+try:
+    fail
+except (TypeError, ValueError, Exception):
+    print('except 4')