feat: Revised the book (#978)

* Sync recent changes to the revised Word.

* Revised the preface chapter

* Revised the introduction chapter

* Revised the computation complexity chapter

* Revised the chapter data structure

* Revised the chapter array and linked list

* Revised the chapter stack and queue

* Revised the chapter hashing

* Revised the chapter tree

* Revised the chapter heap

* Revised the chapter graph

* Revised the chapter searching

* Reivised the sorting chapter

* Revised the divide and conquer chapter

* Revised the chapter backtacking

* Revised the DP chapter

* Revised the greedy chapter

* Revised the appendix chapter

* Revised the preface chapter doubly

* Revised the figures

codes/swift/chapter_dynamic_programming/edit_distance.swift

@@ -73,7 +73,7 @@ func editDistanceDP(s: String, t: String) -> Int {
     for j in stride(from: 1, through: m, by: 1) {
         dp[0][j] = j
     }
-    // 状态转移：其余行列
+    // 状态转移：其余行和列
     for i in stride(from: 1, through: n, by: 1) {
         for j in stride(from: 1, through: m, by: 1) {
             if s.utf8CString[i - 1] == t.utf8CString[j - 1] {