The _fill_states() method returns a list of strings, but the type
annotation incorrectly specified str. Update the annotation to
list[str] to match the actual return value.

Signed-off-by: Wander Lairson Costa <[email protected]>
---
 tools/verification/rvgen/rvgen/ltl2k.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/verification/rvgen/rvgen/ltl2k.py 
b/tools/verification/rvgen/rvgen/ltl2k.py
index 2c564cc937235..de765b8486bd1 100644
--- a/tools/verification/rvgen/rvgen/ltl2k.py
+++ b/tools/verification/rvgen/rvgen/ltl2k.py
@@ -71,7 +71,7 @@ class ltl2k(generator.Monitor):
         if not self.name:
             self.name = Path(file_path).stem
 
-    def _fill_states(self) -> str:
+    def _fill_states(self) -> list[str]:
         buf = [
             "enum ltl_buchi_state {",
         ]
-- 
2.52.0


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