line.go
func (l *line) fileName() string {
	return l.file.path + dot + l.opts.Extension
}
func (l *line) fileName() string {
	return l.file.path + dot + l.opts.Extension
}
func ( l * line ) fileName ( ) string { return l . file . path + dot + l . opts . Extension }
// fileName returns the file name.
fileName returns the file name .