Panic parsing URL

[denisa]

With - multi-line output with HERE doc (<https://github.com/github/docs/issues/21529>), emits

panic: runtime error: index out of range [18] with length 18 [recovered]
	panic: runtime error: index out of range [18] with length 18

goroutine 71 [running]:
testing.tRunner.func1.2({0x7135e0, 0xc00043d968})
	/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1526 +0x24e
testing.tRunner.func1()
	/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1529 +0x39f
panic({0x7135e0, 0xc00043d968})
	/opt/hostedtoolcache/go/1.20.2/x64/src/runtime/panic.go:884 +0x213
github.com/yuin/goldmark/renderer.(*renderer).Render.func2({0x7e5910, 0xc0001cbc20}, 0x80?)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/renderer/renderer.go:164 +0xd9
github.com/yuin/goldmark/ast.walkHelper({0x7e5910, 0xc0001cbc20}, 0xc0004e9c18)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/ast/ast.go:492 +0x34
github.com/yuin/goldmark/ast.walkHelper({0x7e6c30, 0xc000261600}, 0xc0004e9c18)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/ast/ast.go:498 +0x8e
github.com/yuin/goldmark/ast.walkHelper({0x7e6690, 0xc0002d55f0}, 0xc0004e9c18)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/ast/ast.go:498 +0x8e
github.com/yuin/goldmark/ast.walkHelper({0x7e6570, 0xc0002d5560}, 0xc0004e9c18)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/ast/ast.go:498 +0x8e
github.com/yuin/goldmark/ast.walkHelper({0x7e5d90, 0xc0002d4990}, 0xc0004e9c18)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/ast/ast.go:498 +0x8e
github.com/yuin/goldmark/ast.Walk(...)
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/ast/ast.go:487
github.com/yuin/goldmark/renderer.(*renderer).Render(0xc000415b80, {0x7e17a0?, 0xc0004ec3f0?}, {0xc0004ee000, 0x1f2c, 0x1f2d}, {0x7e5d90, 0xc0002d4990})
	/home/runner/go/pkg/mod/github.com/yuin/goldmark@v1.5.4/renderer/renderer.go:161 +0x225
github.com/denisa/clq.(*Clq).entryPoint(0xc000415b30, {0x72cfe4, 0x3}, {0xc0001c0500, 0x3, 0x4})
	/home/runner/work/clq/clq/clq.go:94 +0x9f4
github.com/denisa/clq.Scenario.executeClq({{0x0, 0x0}, {0xc000129950, 0x10}, {0x0, 0x0}, 0x0, {0xc0001c0500, 0x3, 0x4}, ...}, ...)
	/home/runner/work/clq/clq/clq_test.go:108 +0x18e
github.com/denisa/clq.TestScenarios.func1(0x0?)
	/home/runner/work/clq/clq/clq_test.go:84 +0x2c5
testing.tRunner(0xc000347860, 0xc000136e00)
	/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1576 +0x10b
created by testing.(*T).Run
	/opt/hostedtoolcache/go/1.20.2/x64/src/testing/testing.go:1629 +0x3ea