[docs] improvement / for uncaught exception on duplicated Routes (since v. 3.1.0)

[ibrainventures]

What problem does this feature solve?

Hi,

would be great to have updated examples for the programmatic routing:

https://router.vuejs.org/guide/essentials/navigation.html

for :

router.push('/location', () => {})

and/or have a link ( on the #2881 (comment) )

Would be great.

What does the proposed API look like?

It would help to prevent or solve this log warnings.

[posva]

This is now covered by https://router.vuejs.org/guide/advanced/navigation-failures.html