Fixes a bug with our cleanupText helper where it fails on the empty
string or string with only space character(s).
Fixes https://tldraw.sentry.io/issues/4593272987
### Change Type
- [x] `patch` — Bug fix
[^1]: publishes a `patch` release, for devDependencies use `internal`
[^2]: will not publish a new version
### Test Plan
1. Add a step-by-step description of how to test your PR here.
2.
- [x] Unit Tests
- [ ] End to end tests
### Release Notes
- Fixes a minor bug where cleaning up text would fail.
8a1b014b02