Use a neutral issue number in the test fixtures

The digits carry no meaning for the test -- only the `#` does -- and a
bare number in a rope test reads as a rope issue.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01V5GqJKaXZzFzmFEYgo4pPR

Author: quazardous

ropetest/refactor/patchedasttest.py

@@ -288,7 +288,7 @@ def test_handling_hash_inside_implicitly_concatenated_fstrings(self):
         source = dedent("""\
             assert flag, (
                 f"one "
-                f"two (#1693).")
+                f"two (#123).")
             """)
         ast_frag = patchedast.get_patched_ast(source, True)
         self.assertEqual(source, patchedast.write_ast(ast_frag))
@@ -297,7 +297,7 @@ def test_handling_hash_inside_a_plain_string(self):
         source = dedent("""\
             assert flag, (
                 "one "
-                "two (#1693).")
+                "two (#123).")
             """)
         ast_frag = patchedast.get_patched_ast(source, True)
         self.assertEqual(source, patchedast.write_ast(ast_frag))