fix: correct formatting and add missing newlines in selector and EXAMPLE service

unshackle/services/EXAMPLE/__init__.py

@@ -325,7 +325,7 @@ class EXAMPLE(Service):
             return response.json().get("license")
         except ValueError:
             return response.content
-          
+
     def get_playready_license(self, *, challenge: bytes, title: Title_T, track: AnyTrack) -> Optional[Union[bytes, str]]:
         license_url = self.config["endpoints"].get("playready_license")
         if not license_url:
@@ -339,4 +339,4 @@ class EXAMPLE(Service):
             },
         )
         response.raise_for_status()
-        return response.content
+        return response.content