Linting on PLIST viewer operation.

src/core/operations/PLISTViewer.mjs

@@ -72,7 +72,7 @@ class PLISTViewer extends Operation {
          * @param {number} offset
          */
         function braces(elem, vals, offset) {
-            let temp = vals.indexOf(elem);
+            const temp = vals.indexOf(elem);
             if (temp !== -1) {
                 depthCount += offset;
                 if (temp === 1)