Fix showing errors and usages

[kyoshidajp]

No description provided.

[github-actions]

Code Metrics Report

	main (cf803ef)	#45 (22c1ba3)	+/-
Coverage	70.0%	70.0%	0.0%
Code to Test Ratio	1:0.6	1:0.6	-0.0
Test Execution Time	26s	31s	+5s

Details

  |                     | main (cf803ef) | #45 (22c1ba3) | +/-  |
  |---------------------|----------------|---------------|------|
  | Coverage            |          70.0% |         70.0% | 0.0% |
  |   Files             |             19 |            19 |    0 |
  |   Lines             |            463 |           463 |    0 |
  |   Covered           |            324 |           324 |    0 |
- | Code to Test Ratio  |          1:0.6 |         1:0.6 | -0.0 |
  |   Code              |           1350 |          1352 |   +2 |
  |   Test              |            844 |           844 |    0 |
- | Test Execution Time |            26s |           31s |  +5s |

Code coverage of files in pull request scope (81.5% → 81.5%)

Files	Coverage	+/-
cmd/diagnose.go	94.8%	0.0%
cmd/root.go	0.0%	0.0%

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Reported by octocov

[github-actions]

Pull Request Test Coverage Report for Build 6759676411

• 1 of 4 (25.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.2%) to 67.224%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
cmd/root.go	0	3	0.0%

Totals
Change from base Build 6759059381:	-0.2%
Covered Lines:	523
Relevant Lines:	778

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💛 - Coveralls