Fix #64 and some lint warnings

extension/_test/linkify.txt

@@ -130,3 +130,10 @@ https://github.com/sunday's
 //- - - - - - - - -//
 <p><a href="https://github.com/sunday's">https://github.com/sunday's</a></p>
 //= = = = = = = = = = = = = = = = = = = = = = = =//
+
+13
+//- - - - - - - - -//
+https://github.com?q=stars:>1
+//- - - - - - - - -//
+<p><a href="https://github.com?q=stars:%3E1">https://github.com?q=stars:&gt;1</a></p>
+//= = = = = = = = = = = = = = = = = = = = = = = =//

extension/linkify.go

@@ -12,7 +12,7 @@ import (
 
 var wwwURLRegxp = regexp.MustCompile(`^www\.[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b(?:[-a-zA-Z0-9@:%_\+.~#?&//=\(\);,'"]*)`)
 
-var urlRegexp = regexp.MustCompile(`^(?:http|https|ftp):\/\/(?:www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+.~#?&//=\(\);,'"]*)`)
+var urlRegexp = regexp.MustCompile(`^(?:http|https|ftp):\/\/(?:www\.)?[-a-zA-Z0-9@:%._\+~#=]{2,256}\.[a-z]{2,6}\b([-a-zA-Z0-9@:%_\+\.~#$!?&//=\(\);,'"<>\^{}\[\]` + "`" + `]*)`)
 
 type linkifyParser struct {
 }

parser/delimiter.go

@@ -127,15 +127,15 @@ func ScanDelimiter(line []byte, before rune, min int, processor DelimiterProcess
 			after = util.ToRune(line, j)
 		}
 
-		isLeft, isRight, canOpen, canClose := false, false, false, false
+		canOpen, canClose := false, false
 		beforeIsPunctuation := unicode.IsPunct(before)
 		beforeIsWhitespace := unicode.IsSpace(before)
 		afterIsPunctuation := unicode.IsPunct(after)
 		afterIsWhitespace := unicode.IsSpace(after)
 
-		isLeft = !afterIsWhitespace &&
+		isLeft := !afterIsWhitespace &&
 			(!afterIsPunctuation || beforeIsWhitespace || beforeIsPunctuation)
-		isRight = !beforeIsWhitespace &&
+		isRight := !beforeIsWhitespace &&
 			(!beforeIsPunctuation || afterIsWhitespace || afterIsPunctuation)
 
 		if line[i] == '_' {

parser/html_block.go

@@ -118,9 +118,7 @@ func (b *htmlBlockParser) Open(parent ast.Node, reader text.Reader, pc Context)
 		return nil, NoChildren
 	}
 
-	tagName := ""
 	if m := htmlBlockType1OpenRegexp.FindSubmatchIndex(line); m != nil {
-		tagName = string(line[m[2]:m[3]])
 		node = ast.NewHTMLBlock(ast.HTMLBlockType1)
 	} else if htmlBlockType2OpenRegexp.Match(line) {
 		node = ast.NewHTMLBlock(ast.HTMLBlockType2)
@@ -133,7 +131,7 @@ func (b *htmlBlockParser) Open(parent ast.Node, reader text.Reader, pc Context)
 	} else if match := htmlBlockType7Regexp.FindSubmatchIndex(line); match != nil {
 		isCloseTag := match[2] > -1 && bytes.Equal(line[match[2]:match[3]], []byte("/"))
 		hasAttr := match[6] != match[7]
-		tagName = strings.ToLower(string(line[match[4]:match[5]]))
+		tagName := strings.ToLower(string(line[match[4]:match[5]]))
 		_, ok := allowedBlockTags[tagName]
 		if ok {
 			node = ast.NewHTMLBlock(ast.HTMLBlockType6)
@@ -143,7 +141,7 @@ func (b *htmlBlockParser) Open(parent ast.Node, reader text.Reader, pc Context)
 	}
 	if node == nil {
 		if match := htmlBlockType6Regexp.FindSubmatchIndex(line); match != nil {
-			tagName = string(line[match[2]:match[3]])
+			tagName := string(line[match[2]:match[3]])
 			_, ok := allowedBlockTags[strings.ToLower(tagName)]
 			if ok {
 				node = ast.NewHTMLBlock(ast.HTMLBlockType6)

parser/parser.go

@@ -206,6 +206,7 @@ type ContextConfig struct {
 // An ContextOption is a functional option type for the Context.
 type ContextOption func(*ContextConfig)
 
+// WithIDs is a functional option for the Context.
 func WithIDs(ids IDs) ContextOption {
 	return func(c *ContextConfig) {
 		c.IDs = ids

util/util.go

@@ -826,6 +826,7 @@ type bytesFilter struct {
 	slots     [][][]byte
 }
 
+// NewBytesFilter returns a new BytesFilter.
 func NewBytesFilter(elements ...[]byte) BytesFilter {
 	s := &bytesFilter{
 		threshold: 3,