nl_tokens: Stop the process with an error message .
pl_tokens: function halt ( err , options ) { options = Object . assign ( { exitCode : 1 } , <mask> ) if ( err ) { if ( err . code === 'EPIPE' ) { process . exit ( 0 ) /* no big deal */ } else { const t = require ( 'typical' ) printError ( t . isString ( err ) ? err : options . stack ? err . stack : err . message , options ) } } process . exit ( options . exitCode ) }