refactor(commit): rewrite logic and test for tag: --body-length-limit in commit

Author: yjaw

commitizen/commands/commit.py

@@ -109,7 +109,7 @@ def _wrap_body(self, message: str) -> str:
             "body_length_limit", self.config.settings.get("body_length_limit", 0)
         )
         # By the contract, body_length_limit is set to 0 for no limit
-        if body_length_limit <= 0:
+        if not body_length_limit or body_length_limit <= 0:
             return message
 
         lines = message.split("\n")