Revert "Use multi-line regex for '\s'" (#25926)

Reverts zed-industries/zed#19241
Closes: https://github.com/zed-industries/zed/issues/25901

Although `\s` contains `\n` it is widely used in non-multiline regexes (unlike `\n`).
466be14b56Peter Tripp committed on 3/3/2025, 3:32:49 PM· committed by GitHubparent9544619
1 file changedLine totals unavailable