Fix iterator keys

Author: axlewin

src/app/components/content/IsaacCoordinateQuestion.tsx

@@ -52,9 +52,8 @@ export const coordinateInputValidator = (input: (readonly string[])[]) => {
 const CoordinateInput = (props: CoordinateInputProps) => {
     const {value, placeholderValues, numberOfDimensions, onChange, readonly, remove} = props;
     return <span className="coordinate-input">{[...Array(numberOfDimensions)].map((_, i) =>
-        <>
+        <span key={i}>
             (<Input
-                key={i}
                 type="text"
                 className="force-print"
                 placeholder={placeholderValues[i] ?? ""}
@@ -64,7 +63,7 @@ const CoordinateInput = (props: CoordinateInputProps) => {
                 readOnly={readonly}
             />)
             {(i < numberOfDimensions - 1) && <span className="coordinate-input-separator">,&nbsp;</span>}
-        </>)}
+        </span>)}
     {remove && <Button className="ms-3" size="sm" onClick={remove}>Delete</Button>}
     </span>;
 };