style: format markdown files with remark-lint

diff --git a/docs/graph/topo.md b/docs/graph/topo.md
index e866a8b..6787513 100644 (file)
--- a/docs/graph/topo.md
+++ b/docs/graph/topo.md
@@ -130,7 +130,7 @@ bool toposort() {
 
 ## 习题
 
-[CF 1385E](https://codeforces.com/problemset/problem/1385/E)：需要通过拓扑排序构造。
+ [CF 1385E](https://codeforces.com/problemset/problem/1385/E) ：需要通过拓扑排序构造。
 
 ## 参考