refactor: Move check for PROHIBITED_SETTINGS keys up.

Author: radoshi

src/poetry/console/commands/config.py

@@ -122,6 +122,9 @@ def handle(self) -> int:
 
         # show the value if no value is provided
         if not self.argument("value") and not self.option("unset"):
+            if setting_key.split(".")[0] in self.LIST_PROHIBITED_SETTINGS:
+                raise ValueError(f"Expected a value for {setting_key} setting.")
+
             m = re.match(r"^repos?(?:itories)?(?:\.(.+))?", self.argument("key"))
             value: str | dict[str, Any]
             if m:
@@ -138,8 +141,6 @@ def handle(self) -> int:
 
                 self.line(str(value))
             else:
-                if setting_key.split(".")[0] in self.LIST_PROHIBITED_SETTINGS:
-                    raise ValueError(f"Expected a value for {setting_key} setting.")
                 if setting_key not in self.unique_config_values:
                     raise ValueError(f"There is no {setting_key} setting.")