Retrieves name of the current stylesheet.

The theme name that is currently set as the front end theme.

For all intents and purposes, the template name and the stylesheet name
are going to be the same for most cases.

function get_stylesheet() {
	/**
	 * Filters the name of current stylesheet.
	 *
	 * @since 1.5.0
	 *
	 * @param string $stylesheet Name of the current stylesheet.
	 */
	return apply_filters( 'stylesheet', get_option( 'stylesheet' ) );
}