This splits the rink result to move the bracketed text into the description, meaning copying the result will not contain text such as `(dimensionless)` or `(length)`, while still keeping this information present.
This allows for plugins to decide on whether or not a mutable borrow or
a normal borrow is needed of the shared data. It can also now be omitted
alltogether.
This change means that `get_matches` no longer has access to a mutable version of the
state of the plugin. A redesign is needed to allow for this if needed.
