func lineNumber(c *ansi.Colorer, buf *bytes.Buffer, n int, hasMatch bool) string {
defer buf.Reset()
s := fmt.Sprintf("%d", n)
buf.WriteString(c.Fg(s, ansi.Yellow, ansi.Bold))
if hasMatch {
buf.WriteByte(':')
} else {
buf.WriteByte('-')
}
for i := len(s); i < 6; i++ {
buf.WriteByte(' ')
}
return buf.String()
}
