I just noticed this. V6.8.9 has them. The line numbers are missing for me on both Windows and Linux.
Leo 6.8.10-devel, devel branch, build e27cb8be06
2026-07-21 05:32:28 -0500
Python 3.13.14, PyQt version 6.11.1
Windows 11 AMD64 (build 10.0.26200) SP0