function transform( chunk, enc, clbk ) {
		var c;
		var i;

		for ( i = 0; i < chunk.length; i++ ) {
			c = fromCodePoint( chunk[ i ] );
			if ( c === '\n' ) {
				flush();
			} else {
				line += c;
			}
		}
		clbk();
	}
Callback invoked upon receiving a new chunk.

@private
@param {(Buffer|string)} chunk - chunk
@param {string} enc - Buffer encoding
@param {Callback} clbk - callback to invoke after transforming the streamed chunk