plain_text_inner.go
func newPlainTextInner(ln *line, rslt *result, src *source, parent element, insertBr bool, opts *Options) *plainTextInner {
	return &plainTextInner{
		elementBase: newElementBase(ln, rslt, src, parent, opts),
		insertBr:    insertBr,
	}
}
func newPlainTextInner(ln *line, rslt *result, src *source, parent element, insertBr bool, opts *Options) *plainTextInner {
	return &plainTextInner{
		elementBase: newElementBase(ln, rslt, src, parent, opts),
		insertBr:    insertBr,
	}
}
// newPlainTextInner creates and returns a plain text.