build: go mod vendor

vendor/github.com/muesli/reflow/ansi/buffer.go

@@ -1,40 +0,0 @@
-package ansi
-
-import (
-	"bytes"
-
-	"github.com/mattn/go-runewidth"
-)
-
-// Buffer is a buffer aware of ANSI escape sequences.
-type Buffer struct {
-	bytes.Buffer
-}
-
-// PrintableRuneWidth returns the cell width of all printable runes in the
-// buffer.
-func (w Buffer) PrintableRuneWidth() int {
-	return PrintableRuneWidth(w.String())
-}
-
-// PrintableRuneWidth returns the cell width of the given string.
-func PrintableRuneWidth(s string) int {
-	var n int
-	var ansi bool
-
-	for _, c := range s {
-		if c == Marker {
-			// ANSI escape sequence
-			ansi = true
-		} else if ansi {
-			if IsTerminator(c) {
-				// ANSI sequence terminated
-				ansi = false
-			}
-		} else {
-			n += runewidth.RuneWidth(c)
-		}
-	}
-
-	return n
-}