[BUG] 2.0.3 change half-width space to ` ` automactially

[akari0624]

Hi thanks for this wonderful editor,
But we found version 2.0.3 automatically converts regular spaces to   , while version 2.0.2 does not .

Expected Behavior

Regular spaces should remain as normal space characters in the output, maintaining consistency with version 2.0.2 behavior. According to semantic versioning, patch versions (2.0.2 → 2.0.3) should only include backwards-compatible bug fixes, not behavioral changes.

[alex-moon]

Duplicates #4535 and #4509 - maintainers of this repo need to undo this mistake (and it clearly is a mistake) ASAP.