Update solution.md

leviding · web-flow · commit 667dadb97d68 · 2019-11-12T09:32:01.000+08:00
diff --git a/1-js/02-first-steps/12-while-for/1-loop-last-value/solution.md b/1-js/02-first-steps/12-while-for/1-loop-last-value/solution.md
@@ -1,4 +1,4 @@
-答案是：`1` 。
+答案是：`1`。
 
 ```js run
 let i = 3;
