Fixes for CodeQL

[codecov[bot]]

Codecov Report

Base: 97.08% // Head: 96.86% // Decreases project coverage by -0.21% :warning:

Coverage data is based on head (d0c6025) compared to base (977a156). Patch coverage: 86.66% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #54 +/- ## ========================================== - Coverage 97.08% 96.86% -0.22% ========================================== Files 12 12 Lines 1062 1054 -8 Branches 227 224 -3 ========================================== - Hits 1031 1021 -10 - Misses 12 15 +3 + Partials 19 18 -1 ``` | Flag | Coverage Δ | | |---|---|---| | unittests | `96.86% <86.66%> (-0.22%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/tammoippen/plotille/pull/54?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen) | Coverage Δ | | |---|---|---| | [plotille/\_figure.py](https://codecov.io/gh/tammoippen/plotille/pull/54/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen#diff-cGxvdGlsbGUvX2ZpZ3VyZS5weQ==) | `96.15% <66.66%> (-0.68%)` | :arrow_down: | | [plotille/\_cmaps.py](https://codecov.io/gh/tammoippen/plotille/pull/54/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen#diff-cGxvdGlsbGUvX2NtYXBzLnB5) | `100.00% <100.00%> (ø)` | | | [plotille/\_input\_formatter.py](https://codecov.io/gh/tammoippen/plotille/pull/54/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen#diff-cGxvdGlsbGUvX2lucHV0X2Zvcm1hdHRlci5weQ==) | `99.19% <100.00%> (ø)` | | | [plotille/\_util.py](https://codecov.io/gh/tammoippen/plotille/pull/54/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen#diff-cGxvdGlsbGUvX3V0aWwucHk=) | `93.87% <100.00%> (-0.96%)` | :arrow_down: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Tammo+Ippen)

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