code: function normalizeProfile(profile) {
  		if (typeof profile === 'object') {
  			if ('indent' in profile) {
  				profile.indent = !!profile.indent;
  			}
  
  			if ('self_closing_tag' in profile) {
  				if (typeof profile.self_closing_tag === 'number') {
  					profile.self_closing_tag = !!profile.self_closing_tag;
  				}
  			}
  		}
  
  		return profile;
  	}
docs: Normalizes profile definition: converts some
  properties to valid data types
  @param {Object} profile
  @return {Object}