Add fix/test for dadt(#) on lhs

[codecov[bot]]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (c1b9a64) 90.75% compared to head (09f52dc) 90.73%.

:exclamation: Current head 09f52dc differs from pull request most recent head c4a11a2. Consider uploading reports for the commit c4a11a2 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #165 +/- ## ========================================== - Coverage 90.75% 90.73% -0.03% ========================================== Files 53 53 Lines 6401 6419 +18 ========================================== + Hits 5809 5824 +15 - Misses 592 595 +3 ``` | [Files](https://app.codecov.io/gh/nlmixr2/nonmem2rx/pull/165?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlmixr2) | Coverage Δ | | |---|---|---| | [src/abbrev.c](https://app.codecov.io/gh/nlmixr2/nonmem2rx/pull/165?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlmixr2#diff-c3JjL2FiYnJldi5j) | `96.73% <89.65%> (-0.24%)` | :arrow_down: |

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