vim: Fix `space` not handling non-ascii characters (#27053)

Closes #26806

Changes: Clips the new point with `Bias::Right` like in
`saturating_right`

Release Notes:

- vim: Fixed `space` not handling non-ascii characters
84a8d481785brian committed on 3/19/2025, 1:28:50 PM· committed by GitHubparentac5dafc
2 files changedLine totals unavailable