Fix some stuff in catch-all docs (#897)

Author: brenelz

src/routes/solid-start/building-your-application/routing.mdx

@@ -178,8 +178,8 @@ They are defined using square brackets with `...` before the label for the route
 ```
 
 A catch-all route will have one parameter which is a forward-slash delimited string of all the URL segments after the last valid segment.
-For example, with the route `[..post]` and a URL path of `/post/foo` the `params` object returned from the `useParams` primitive will have a `post` property with the value of `foo`.
-For a URL path of `/post/foo/baz` it will be `foo/baz`.
+For example, with the route `[...post]` and a URL path of `/post/foo` the `params` object returned from the `useParams` primitive will have a `post` property with the value of `post/foo`.
+For a URL path of `/post/foo/baz` it will be `post/foo/baz`.
 
 ```tsx title="routes/blog/[...post].tsx"
 import { useParams } from "@solidjs/router";