Update transitions.md (#1364)

AndreasCag · Jinjiang · commit 139c16caeff6 · 2018-01-08T12:06:51.000+08:00
Fix small mistake.
diff --git a/src/v2/guide/transitions.md b/src/v2/guide/transitions.md
@@ -49,10 +49,10 @@ new Vue({
 
 ``` css
 .fade-enter-active, .fade-leave-active {
-  transition: opacity .5s
+  transition: opacity .5s;
 }
-.fade-enter, .fade-leave-to /* .fade-leave-active in below version 2.1.8 */ {
-  opacity: 0
+.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
+  opacity: 0;
 }
 ```
 

Original file line number	Diff line number	Diff line change
`@@ -49,10 +49,10 @@ new Vue({`
`49`	`49`
`50`	`50`	``` css
`51`	`51`	`.fade-enter-active, .fade-leave-active {`
`52`		`- transition: opacity .5s`
	`52`	`+ transition: opacity .5s;`
`53`	`53`	`}`
`54`		`-.fade-enter, .fade-leave-to /* .fade-leave-active in below version 2.1.8 */ {`
`55`		`- opacity: 0`
	`54`	`+.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {`
	`55`	`+ opacity: 0;`
`56`	`56`	`}`
`57`	`57`	```
`58`	`58`