Fix/omml linebreak

[opoudjis]

Metanorma PR checklist

• [ ] Breaking changes (list related PRs)
• [ ] Documentation update required (create task for this)
• [ ] External dependency introduced (documentation update need)
• [ ] Gem with native library introduced

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (5e0e15e) 95.18% compared to head (993cd07) 95.17%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #87 +/- ## ========================================== - Coverage 95.18% 95.17% -0.01% ========================================== Files 7 7 Lines 540 539 -1 ========================================== - Hits 514 513 -1 Misses 26 26 ```

:umbrella: View full report in Codecov by Sentry.
:loudspeaker: Have feedback on the report? Share it here.