Add spaces after control flow statements.

Adding spaces.

Author: aadil42

javascript/0988-smallest-string-starting-from-leaf.js

@@ -23,24 +23,24 @@ var smallestFromLeaf = function(root) {
 
         const char = String.fromCharCode(node.val+97);
 
-        if(!node.left && !node.right) {
+        if (!node.left && !node.right) {
             str.push(char);
             const str1 = str.slice(0).reverse().join("");
-            if(str1 < smallest) {
+            if (str1 < smallest) {
                 smallest = str1;
             }
             str.pop();
             return;
 
         }
 
-        if(node.left) {
+        if (node.left) {
             str.push(char);
             dfs(node.left, str);
             str.pop();
         }
 
-        if(node.right) {
+        if (node.right) {
             str.push(char);
             dfs(node.right, str);
             str.pop();