Fix a test to be usable with PEP626

In the old code, the return and raise were unreachable, so Python 3.10
compiled them away.  This meant the return and raise messages weren't in
the missing arc fragments.  The new code has a path to the return and
raise.

Author: nedbat

tests/test_parser.py

@@ -330,69 +330,71 @@ def function():
                     try:
                         if something(4):
                             break
+                        elif something(6):
+                            x = 7
                         else:
-                            if something(7):
+                            if something(9):
                                 continue
                             else:
                                 continue
-                        if also_this(11):
-                            return 12
+                        if also_this(13):
+                            return 14
                         else:
-                            raise Exception(14)
+                            raise Exception(16)
                     finally:
-                        this_thing(16)
-                that_thing(17)
+                        this_thing(18)
+                that_thing(19)
             """)
         if env.PYBEHAVIOR.finally_jumps_back:
             self.assertEqual(
-                parser.missing_arc_description(16, 5),
-                "line 16 didn't jump to line 5, because the break on line 5 wasn't executed"
+                parser.missing_arc_description(18, 5),
+                "line 18 didn't jump to line 5, because the break on line 5 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(5, 17),
-                "line 5 didn't jump to line 17, because the break on line 5 wasn't executed"
+                parser.missing_arc_description(5, 19),
+                "line 5 didn't jump to line 19, because the break on line 5 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(16, 8),
-                "line 16 didn't jump to line 8, because the continue on line 8 wasn't executed"
+                parser.missing_arc_description(18, 10),
+                "line 18 didn't jump to line 10, because the continue on line 10 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(8, 2),
-                "line 8 didn't jump to line 2, because the continue on line 8 wasn't executed"
+                parser.missing_arc_description(10, 2),
+                "line 10 didn't jump to line 2, because the continue on line 10 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(16, 12),
-                "line 16 didn't jump to line 12, because the return on line 12 wasn't executed"
+                parser.missing_arc_description(18, 14),
+                "line 18 didn't jump to line 14, because the return on line 14 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(12, -1),
-                "line 12 didn't return from function 'function', "
-                    "because the return on line 12 wasn't executed"
+                parser.missing_arc_description(14, -1),
+                "line 14 didn't return from function 'function', "
+                    "because the return on line 14 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(16, -1),
-                "line 16 didn't except from function 'function', "
-                    "because the raise on line 14 wasn't executed"
+                parser.missing_arc_description(18, -1),
+                "line 18 didn't except from function 'function', "
+                    "because the raise on line 16 wasn't executed"
             )
         else:
             self.assertEqual(
-                parser.missing_arc_description(16, 17),
-                "line 16 didn't jump to line 17, because the break on line 5 wasn't executed"
+                parser.missing_arc_description(18, 19),
+                "line 18 didn't jump to line 19, because the break on line 5 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(16, 2),
-                "line 16 didn't jump to line 2, "
-                    "because the continue on line 8 wasn't executed"
+                parser.missing_arc_description(18, 2),
+                "line 18 didn't jump to line 2, "
+                    "because the continue on line 10 wasn't executed"
                     " or "
-                    "the continue on line 10 wasn't executed"
+                    "the continue on line 12 wasn't executed"
             )
             self.assertEqual(
-                parser.missing_arc_description(16, -1),
-                "line 16 didn't except from function 'function', "
-                    "because the raise on line 14 wasn't executed"
+                parser.missing_arc_description(18, -1),
+                "line 18 didn't except from function 'function', "
+                    "because the raise on line 16 wasn't executed"
                 " or "
-                "line 16 didn't return from function 'function', "
-                    "because the return on line 12 wasn't executed"
+                "line 18 didn't return from function 'function', "
+                    "because the return on line 14 wasn't executed"
             )
 
     def test_missing_arc_descriptions_bug460(self):