When using search field in the docs, additional slashes are inserted in the url

See the illustration below. It's not blocking though.

### Example:

After searching for something 4 times in a row, always from the current page, the URL becomes:

https://bluebrainnexus.io/////docs/utilities/projections.html#projecting-data-into-influxdb

Reproduce the issue from the docs search field by searching four times from the current page, using the example URL under docs/utilities/projections.html. Trace the search entry point that updates the browser URL and confirm that repeated searches preserve a single separator between the host and path. Done means the URL no longer accumulates additional slashes.

Written by the indexing model from the issue text.