docs: fix css example for CSSTransition (#487)

iamvictorli · silvenon · commit fc030bd9aa03 · 2019-04-14T21:17:59.000+02:00
diff --git a/src/CSSTransition.js b/src/CSSTransition.js
@@ -64,7 +64,7 @@ const removeClass = (node, classes) => node && classes && classes.split(' ').for
  * }
  * .my-node-exit-active {
  *   opacity: 0;
- *   transition: opacity: 200ms;
+ *   transition: opacity 200ms;
  * }
  * ```
  *

Original file line number	Diff line number	Diff line change
`@@ -64,7 +64,7 @@ const removeClass = (node, classes) => node && classes && classes.split(' ').for`
`64`	`64`	`* }`
`65`	`65`	`* .my-node-exit-active {`
`66`	`66`	`* opacity: 0;`
`67`		`- * transition: opacity: 200ms;`
	`67`	`+ * transition: opacity 200ms;`
`68`	`68`	`* }`
`69`	`69`	* ```
`70`	`70`	`*`