function createElement( options ) {
	var opts;
	var err;
	opts = copy( defaults );
	if ( arguments.length ) {
		err = validate( opts, options );
		if ( err ) {
			throw err;
		}
	}
	return render( opts );
}
Generates an HTML string for displaying an SVG equation as an image in a GitHub Markdown file.

@param {Options} [options] - function options
@param {string} [options.className='equation'] - element class name
@param {string} [options.align='center'] - element alignment
@param {string} [options.raw] - raw equation text
@param {string} [options.label] - equation label
@param {string} [options.src] - image source URL
@param {string} [options.alt] - alternative image text
@throws {TypeError} options argument must be an object
@throws {TypeError} must provide valid options
@returns {string} HTML string

@example
var opts = {
    'className': 'equation',
    'align': 'center',
    'raw': '\\operatorname{erf}(x) = \\frac{2}{\\sqrt\\pi}\\int_0^x e^{-t^2}\\,\\mathrm dt'
    'label': 'eqn:erf',
    'src': 'https://cdn.jsdelivr.net/gh/stdlib-js/stdlib@master/lib/node_modules/@stdlib/math/base/special/erf/docs/img/eqn.svg'
    'alt': 'Error function.'
};
var html = createElement( opts );
// returns <string>