Function yaml_load

nested/src/modify-ecmascript.js:118–120

	const distinct_id = n_id => Buffer.from(n_id+'').toString('base64').replace(/=+$/, '');

	const yaml_load = z_yaml => 'string' === typeof z_yaml
		? yaml.safeLoad(`%YAML 1.2\n---\n${gobble(z_yaml)}\n`)
		: z_yaml;

	const regexp = r_source => r_source.toString().replace(/^\/(.+)\/[^/]*/, '$1');