Resolve usernames when the remote ends with a trailing slash

Author: AA-Turner

cherry_picker/cherry_picker.py

@@ -196,7 +196,7 @@ def username(self):
         cmd = ["git", "config", "--get", f"remote.{self.pr_remote}.url"]
         result = self.run_cmd(cmd, required_real_result=True)
         # implicit ssh URIs use : to separate host from user, others just use /
-        username = result.replace(":", "/").split("/")[-2]
+        username = result.replace(":", "/").removesuffix("/").split("/")[-2]
         return username
 
     def get_cherry_pick_branch(self, maint_branch):