Adds command token for arguments.

[codecov[bot]]

Codecov Report

Attention: 13 lines in your changes are missing coverage. Please review.

Comparison is base (e2f829b) 49.49% compared to head (7280c24) 52.53%.

:exclamation: Current head 7280c24 differs from pull request most recent head bad9f85. Consider uploading reports for the commit bad9f85 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #568 +/- ## ========================================== + Coverage 49.49% 52.53% +3.03% ========================================== Files 120 120 Lines 8293 8318 +25 Branches 1060 1064 +4 ========================================== + Hits 4105 4370 +265 + Misses 4012 3763 -249 - Partials 176 185 +9 ``` | [Files](https://app.codecov.io/gh/PolyJIT/benchbuild/pull/568?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolyJIT) | Coverage Δ | | |---|---|---| | [benchbuild/command.py](https://app.codecov.io/gh/PolyJIT/benchbuild/pull/568?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolyJIT#diff-YmVuY2hidWlsZC9jb21tYW5kLnB5) | `53.90% <55.17%> (+0.15%)` | :arrow_up: | ... and [6 files with indirect coverage changes](https://app.codecov.io/gh/PolyJIT/benchbuild/pull/568/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=PolyJIT)

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