Make clear the error message of if section

[k1LoW]

ref: #291

[github-actions]

Code Metrics Report

	main (3431179)	#292 (379039b)	+/-
Coverage	66.3%	66.3%	+0.0%
Code to Test Ratio	1:0.5	1:0.5	0.0
Test Execution Time	43s	45s	+2s

Details

  |                     | main (3431179) | #292 (379039b) |  +/-  |
  |---------------------|----------------|----------------|-------|
+ | Coverage            |          66.3% |          66.3% | +0.0% |
  |   Files             |             31 |             31 |     0 |
  |   Lines             |           2838 |           2838 |     0 |
+ |   Covered           |           1882 |           1883 |    +1 |
  | Code to Test Ratio  |          1:0.5 |          1:0.5 |   0.0 |
  |   Code              |           7284 |           7284 |     0 |
  |   Test              |           3660 |           3660 |     0 |
- | Test Execution Time |            43s |            45s |   +2s |

Code coverage of files in pull request scope (60.2% → 60.2%)

Files	Coverage	+/-
config/ready.go	60.2%	0.0%

Benchmark-0 (this is custom metrics test)

	main (3431179)	#292 (379039b)	+/-
Number of iterations	1000	1000	0
Nanoseconds per iteration	676.5 ns/op	676.5 ns/op	0.0 ns/op

Metadata

	main (3431179)	#292 (379039b)
GOOS	darwin	darwin
GOARCH	amd64	amd64

Benchmark-1 (this is custom metrics test)

	main (3431179)	#292 (379039b)	+/-
Number of iterations	1500	1500	0
Nanoseconds per iteration	1345 ns/op	1345 ns/op	0 ns/op

Metadata

	main (3431179)	#292 (379039b)
GOOS	darwin	darwin
GOARCH	amd64	amd64

---

Reported by octocov