fixup: redo-xml Python code fixed using ruff

Author: autoruff

plugwise/legacy/smile.py

@@ -173,11 +173,7 @@ async def set_preset(self, _: str, preset: str) -> None:
         locator = f'rule/directives/when/then[@icon="{preset}"].../.../...'
         rule = self._domain_objects.find(locator)
         data = (
-            "<rules>"
-            "<rule id='{rule.attrib['id']}'>"
-            "<active>true</active>"
-            "</rule>"
-            "</rules>"
+            "<rules><rule id='{rule.attrib['id']}'><active>true</active></rule></rules>"
         )
         await self.call_request(RULES, method="put", data=data)
 

plugwise/smile.py

@@ -190,11 +190,7 @@ async def set_offset(self, dev_id: str, offset: float) -> None:
             )
 
         value = str(offset)
-        data = (
-            "<offset_functionality>"
-            f"<offset>{value}</offset>"
-            "</offset_functionality>"
-        )
+        data = f"<offset_functionality><offset>{value}</offset></offset_functionality>"
         uri = f"{APPLIANCES};id={dev_id}/offset;type=temperature_offset"
         await self.call_request(uri, method="put", data=data)