Clean up go.mod and vendor

vendor/golang.org/x/text/unicode/norm/composition.go

@@ -407,7 +407,7 @@ func decomposeHangul(buf []byte, r rune) int {
 
 // decomposeHangul algorithmically decomposes a Hangul rune into
 // its Jamo components.
-// See https://unicode.org/reports/tr15/#Hangul for details on decomposing Hangul.
+// See http://unicode.org/reports/tr15/#Hangul for details on decomposing Hangul.
 func (rb *reorderBuffer) decomposeHangul(r rune) {
 	r -= hangulBase
 	x := r % jamoTCount
@@ -420,7 +420,7 @@ func (rb *reorderBuffer) decomposeHangul(r rune) {
 }
 
 // combineHangul algorithmically combines Jamo character components into Hangul.
-// See https://unicode.org/reports/tr15/#Hangul for details on combining Hangul.
+// See http://unicode.org/reports/tr15/#Hangul for details on combining Hangul.
 func (rb *reorderBuffer) combineHangul(s, i, k int) {
 	b := rb.rune[:]
 	bn := rb.nrune
@@ -461,10 +461,6 @@ func (rb *reorderBuffer) combineHangul(s, i, k int) {
 // It should only be used to recompose a single segment, as it will not
 // handle alternations between Hangul and non-Hangul characters correctly.
 func (rb *reorderBuffer) compose() {
-	// Lazily load the map used by the combine func below, but do
-	// it outside of the loop.
-	recompMapOnce.Do(buildRecompMap)
-
 	// UAX #15, section X5 , including Corrigendum #5
 	// "In any character sequence beginning with starter S, a character C is
 	//  blocked from S if and only if there is some character B between S

vendor/golang.org/x/text/unicode/norm/forminfo.go

@@ -4,8 +4,6 @@
 
 package norm
 
-import "encoding/binary"
-
 // This file contains Form-specific logic and wrappers for data in tables.go.
 
 // Rune info is stored in a separate trie per composing form. A composing form
@@ -180,17 +178,6 @@ func (p Properties) TrailCCC() uint8 {
 	return ccc[p.tccc]
 }
 
-func buildRecompMap() {
-	recompMap = make(map[uint32]rune, len(recompMapPacked)/8)
-	var buf [8]byte
-	for i := 0; i < len(recompMapPacked); i += 8 {
-		copy(buf[:], recompMapPacked[i:i+8])
-		key := binary.BigEndian.Uint32(buf[:4])
-		val := binary.BigEndian.Uint32(buf[4:])
-		recompMap[key] = rune(val)
-	}
-}
-
 // Recomposition
 // We use 32-bit keys instead of 64-bit for the two codepoint keys.
 // This clips off the bits of three entries, but we know this will not
@@ -199,14 +186,8 @@ func buildRecompMap() {
 // Note that the recomposition map for NFC and NFKC are identical.
 
 // combine returns the combined rune or 0 if it doesn't exist.
-//
-// The caller is responsible for calling
-// recompMapOnce.Do(buildRecompMap) sometime before this is called.
 func combine(a, b rune) rune {
 	key := uint32(uint16(a))<<16 + uint32(uint16(b))
-	if recompMap == nil {
-		panic("caller error") // see func comment
-	}
 	return recompMap[key]
 }
 

vendor/golang.org/x/text/unicode/norm/iter.go

@@ -128,9 +128,8 @@ func (i *Iter) Next() []byte {
 func nextASCIIBytes(i *Iter) []byte {
 	p := i.p + 1
 	if p >= i.rb.nsrc {
-		p0 := i.p
 		i.setDone()
-		return i.rb.src.bytes[p0:p]
+		return i.rb.src.bytes[i.p:p]
 	}
 	if i.rb.src.bytes[p] < utf8.RuneSelf {
 		p0 := i.p

vendor/golang.org/x/text/unicode/norm/normalize.go

@@ -29,8 +29,8 @@ import (
 // proceed independently on both sides:
 //   f(x) == append(f(x[0:n]), f(x[n:])...)
 //
-// References: https://unicode.org/reports/tr15/ and
-// https://unicode.org/notes/tn5/.
+// References: http://unicode.org/reports/tr15/ and
+// http://unicode.org/notes/tn5/.
 type Form int
 
 const (

vendor/golang.org/x/text/unicode/norm/readwriter.go

@@ -60,8 +60,8 @@ func (w *normWriter) Close() error {
 }
 
 // Writer returns a new writer that implements Write(b)
-// by writing f(b) to w. The returned writer may use an
-// internal buffer to maintain state across Write calls.
+// by writing f(b) to w.  The returned writer may use an
+// an internal buffer to maintain state across Write calls.
 // Calling its Close method writes any buffered data to w.
 func (f Form) Writer(w io.Writer) io.WriteCloser {
 	wr := &normWriter{rb: reorderBuffer{}, w: w}

vendor/golang.org/x/text/unicode/norm/transform.go

@@ -18,6 +18,7 @@ func (Form) Reset() {}
 // Users should either catch ErrShortDst and allow dst to grow or have dst be at
 // least of size MaxTransformChunkSize to be guaranteed of progress.
 func (f Form) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
+	n := 0
 	// Cap the maximum number of src bytes to check.
 	b := src
 	eof := atEOF
@@ -26,14 +27,13 @@ func (f Form) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error)
 		eof = false
 		b = b[:ns]
 	}
-	i, ok := formTable[f].quickSpan(inputBytes(b), 0, len(b), eof)
-	n := copy(dst, b[:i])
+	i, ok := formTable[f].quickSpan(inputBytes(b), n, len(b), eof)
+	n += copy(dst[n:], b[n:i])
 	if !ok {
 		nDst, nSrc, err = f.transform(dst[n:], src[n:], atEOF)
 		return nDst + n, nSrc + n, err
 	}
-
-	if err == nil && n < len(src) && !atEOF {
+	if n < len(src) && !atEOF {
 		err = transform.ErrShortSrc
 	}
 	return n, n, err
@@ -79,7 +79,7 @@ func (f Form) transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error)
 		nSrc += n
 		nDst += n
 		if ok {
-			if err == nil && n < rb.nsrc && !atEOF {
+			if n < rb.nsrc && !atEOF {
 				err = transform.ErrShortSrc
 			}
 			return nDst, nSrc, err