repl: eliminate var in function _memory

Author: gengjiawen

lib/repl.js

@@ -1323,7 +1323,7 @@ function _memory(cmd) {
     let up = cmd.match(/[})]/g);
     up = up ? up.length : 0;
     dw = dw ? dw.length : 0;
-    var depth = dw - up;
+    let depth = dw - up;
 
     if (depth) {
       (function workIt() {
@@ -1342,9 +1342,9 @@ function _memory(cmd) {
           });
         } else if (depth < 0) {
           // Going... up.
-          var curr = self.lines.level.pop();
+          const curr = self.lines.level.pop();
           if (curr) {
-            var tmp = curr.depth + depth;
+            const tmp = curr.depth + depth;
             if (tmp < 0) {
               // More to go, recurse
               depth += curr.depth;