style: format code and docs with prettier

Author: samarthswami1016

solution/1900-1999/1948.Delete Duplicate Folders in System/README.md

@@ -197,7 +197,7 @@ class Solution {
             }
         }
 
-        Map<String, Integer> freq = new HashMap<>(); 
+        Map<String, Integer> freq = new HashMap<>();
         construct(root, freq);
         List<List<String>> ans = new ArrayList<>();
         List<String> path = new ArrayList<>();

solution/1900-1999/1948.Delete Duplicate Folders in System/README_EN.md

@@ -176,7 +176,7 @@ class Solution {
             }
         }
 
-        Map<String, Integer> freq = new HashMap<>(); 
+        Map<String, Integer> freq = new HashMap<>();
         construct(root, freq);
         List<List<String>> ans = new ArrayList<>();
         List<String> path = new ArrayList<>();

solution/1900-1999/1948.Delete Duplicate Folders in System/solution.js

@@ -1,7 +1,7 @@
 var deleteDuplicateFolder = function (paths) {
     class Trie {
         constructor() {
-            this.serial = "";
+            this.serial = '';
             this.children = new Map();
         }
     }
@@ -26,7 +26,7 @@ var deleteDuplicateFolder = function (paths) {
             v.push(`${folder}(${child.serial})`);
         }
         v.sort();
-        node.serial = v.join("");
+        node.serial = v.join('');
         freq.set(node.serial, (freq.get(node.serial) || 0) + 1);
     }
     construct(root);
@@ -47,4 +47,4 @@ var deleteDuplicateFolder = function (paths) {
     operate(root);
 
     return ans;
-};
+};