style: format code and docs with prettier

Author: klever34

lcof/面试题47. 礼物的最大价值/README.md

@@ -206,13 +206,13 @@ class Solution {
         let m = grid.count
         let n = grid[0].count
         var f = [[Int]](repeating: [Int](repeating: 0, count: n + 1), count: m + 1)
-        
+
         for i in 1...m {
             for j in 1...n {
                 f[i][j] = max(f[i - 1][j], f[i][j - 1]) + grid[i - 1][j - 1]
             }
         }
-        
+
         return f[m][n]
     }
 }