Fix parser

[goccy]

total:[402] passed:[290] failure:[112] passedRate:[72.139305%]

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 96.29630% with 2 lines in your changes missing coverage. Please review.

Project coverage is 77.09%. Comparing base (01f4bac) to head (341f0bd).

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #554      +/-   ##
==========================================
+ Coverage   77.00%   77.09%   +0.09%     
==========================================
  Files          21       21              
  Lines        7270     7321      +51     
==========================================
+ Hits         5598     5644      +46     
- Misses       1277     1283       +6     
+ Partials      395      394       -1     

[alexandear]

Perhaps we can simplify:

Suggested change

	var marker string
	if len(src) == 3 {
	marker = string(src)
	} else {
	marker = strings.TrimRightFunc(string(src[:4]), func(r rune) bool {
	return r == ' ' || r == '\t' || r == '\n' || r == '\r'
	})
	}
	marker := string(src)
	if len(src) != 3 {
	marker = strings.TrimRightFunc(string(src[:4]), unicode.IsSpace)
	}

[goccy]

IsSpace contains \v and others, so it does not compatible this function.
https://pkg.go.dev/unicode#IsSpace