docs: fix typo in migration guide (#534)

diff --git a/docs/guide/migration/index.md b/docs/guide/migration/index.md
index 9112d54188bfc7897f2fc088186aef4b62e3c627..33dd30f02ba924d3895a7d162a37713a7225daf0 100644 (file)
--- a/docs/guide/migration/index.md
+++ b/docs/guide/migration/index.md
@@ -137,7 +137,7 @@ The object returned in `scrollBehavior` is now similar to [`ScrollToOptions`](ht
 </router-view>
 ```
 
-**Reason**: This is was a necessary change. See the [related RFC](https://github.com/vuejs/rfcs/blob/master/active-rfcs/0034-router-view-keep-alive-transitions.md).
+**Reason**: This was a necessary change. See the [related RFC](https://github.com/vuejs/rfcs/blob/master/active-rfcs/0034-router-view-keep-alive-transitions.md).
 
 ### Removal of `append` prop in `<router-link>`