nl_tokens: Clear line until last new line white character
pl_tokens: function clearLine ( ) { if ( process . stdout . clearLine ) { process . stdout . clearLine ( ) ; process . stdout . cursorTo ( 0 ) ; } else { var str = '\r' , i = 0 ; for ( i = 0 ; i < lastLineLength ; i ++ ) { str += ' ' ; } process . stdout . write ( str ) ; } lastLineLength = 0 ; return <mask> ; }