code: function updateDescription( txt ) {
  		var ch;
  		if ( txt.length === 0 ) {
  			return txt;
  		}
  		ch = txt[ 0 ].toUpperCase();
  		if ( ch !== txt[ 0 ] ) {
  			txt = ch + txt.slice( 1 );
  		}
  		if ( txt.charCodeAt( txt.length-1 ) !== 46 ) { // .
  			txt += '.';
  		}
  		return txt;
  	}
docs: Updates a description.
  
  @private
  @param {string} txt - description
  @returns {string} updated description