fix: reduce boilerplate code

[codecov-commenter]

Codecov Report

Attention: 5 lines in your changes are missing coverage. Please review.

Comparison is base (2c735b8) 59.17% compared to head (94c3d10) 59.19%. Report is 1 commits behind head on master.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1043 +/- ## ========================================== + Coverage 59.17% 59.19% +0.02% ========================================== Files 19 19 Lines 2557 2551 -6 Branches 916 912 -4 ========================================== - Hits 1513 1510 -3 Misses 695 695 + Partials 349 346 -3 ``` | [Files](https://app.codecov.io/gh/google/glog/pull/1043?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=google) | Coverage Δ | | |---|---|---| | [src/utilities.h](https://app.codecov.io/gh/google/glog/pull/1043?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=google#diff-c3JjL3V0aWxpdGllcy5o) | `100.00% <100.00%> (ø)` | | | [src/logging.cc](https://app.codecov.io/gh/google/glog/pull/1043?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=google#diff-c3JjL2xvZ2dpbmcuY2M=) | `67.27% <76.19%> (+0.05%)` | :arrow_up: |