chore: introduce custom printing function

[codecov-commenter]

Codecov Report

Patch coverage: 90.90% and project coverage change: +1.25% :tada:

Comparison is base (f7d663e) 76.28% compared to head (d0cc925) 77.54%. Report is 2 commits behind head on master.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #144 +/- ## ========================================== + Coverage 76.28% 77.54% +1.25% ========================================== Files 98 98 Lines 7123 7147 +24 ========================================== + Hits 5434 5542 +108 + Misses 1689 1605 -84 ``` | [Files Changed](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman) | Coverage Δ | | |---|---|---| | [util/fibers/detail/fiber\_interface.h](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZGV0YWlsL2ZpYmVyX2ludGVyZmFjZS5o) | `92.59% <ø> (ø)` | | | [util/fibers/detail/scheduler.h](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZGV0YWlsL3NjaGVkdWxlci5o) | `100.00% <ø> (ø)` | | | [util/fibers/epoll\_proactor.h](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZXBvbGxfcHJvYWN0b3IuaA==) | `100.00% <ø> (ø)` | | | [util/fibers/proactor\_base.h](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvcHJvYWN0b3JfYmFzZS5o) | `92.53% <ø> (ø)` | | | [util/fibers/epoll\_proactor.cc](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZXBvbGxfcHJvYWN0b3IuY2M=) | `87.73% <66.66%> (+11.06%)` | :arrow_up: | | [util/fibers/detail/fiber\_interface.cc](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZGV0YWlsL2ZpYmVyX2ludGVyZmFjZS5jYw==) | `90.19% <70.00%> (-4.00%)` | :arrow_down: | | [util/fibers/detail/scheduler.cc](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZGV0YWlsL3NjaGVkdWxlci5jYw==) | `97.64% <100.00%> (+0.15%)` | :arrow_up: | | [util/fibers/epoll\_socket.cc](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZXBvbGxfc29ja2V0LmNj) | `73.55% <100.00%> (+0.25%)` | :arrow_up: | | [util/fibers/fibers\_test.cc](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvZmliZXJzX3Rlc3QuY2M=) | `99.10% <100.00%> (+0.01%)` | :arrow_up: | | [util/fibers/uring\_socket.cc](https://app.codecov.io/gh/romange/helio/pull/144?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman#diff-dXRpbC9maWJlcnMvdXJpbmdfc29ja2V0LmNj) | `75.55% <100.00%> (+0.21%)` | :arrow_up: | ... and [3 files with indirect coverage changes](https://app.codecov.io/gh/romange/helio/pull/144/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Roman+Gershman)

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