code: function onFile( error, file ) {
  		if ( error ) {
  			debug( 'Error encountered while attempting to read a temporary output file %s: %s', outFile, error.message );
  			return done( error );
  		}
  		debug( 'Successfully read temporary output file: %s', outFile );
  		unlink( outFile, onDelete );
  
  		/**
  		* FUNCTION: onDelete( [error] )
  		*	Callback invoked upon deleting a file.
  		*
  		* @private
  		* @param {Error} [error] - error object
  		* @returns {Void}
  		*/
  		function onDelete( error ) {
  			if ( error ) {
  				debug( 'Error encountered while attempting to delete a temporary output file %s: %s', outFile, error.message );
  				return done( error );
  			}
  			debug( 'Successfully deleted temporary output file: %s', outFile );
  			done( null, file );
  		} // end FUNCTION onDelete()
  	}
docs: end FUNCTION onExec() 
  FUNCTION: onFile( error, file )
  Callback invoked upon reading a file.
  
  @private
  @param {Error|Null} error - error object
  @param {String} file - file contents
  @returns {Void}