♻️ Refactored linter warnings.

tidal_dl_ng/helper/format.py

@@ -1,9 +1,8 @@
 def is_xml(value: str) -> bool:
     result = False
 
-    if value:
-        if value.startswith("<?xml"):
-            result = True
+    if value and value.startswith("<?xml"):
+        result = True
 
     return result
 
@@ -11,8 +10,7 @@ def is_xml(value: str) -> bool:
 def is_json(value: str) -> bool:
     result = False
 
-    if value:
-        if value.startswith("{"):
-            result = True
+    if value and value.startswith("{"):
+        result = True
 
     return result