old_contents: /*jshint node:true */
  
  'use strict';
  
  var program = require('commander');
  var lc = require('linear-converter');
  
  program
    .version('0.0.1')
    .usage('<number> [options]')
    .option('-n, --negative', 'Treat <number> as negative')
    .option('-u, --unit [unit]', 'Unit for the preset')
    .option('-p, --preset [preset]', 'Name of the preset to use')
    .parse(process.argv);
  
  var x = Number(program.args[0]);
  
  if (program.negative) {
    x = -x;
  }
  
  console.log(lc.convert(x, lc.PRESETS[program.unit][program.preset]));
  
new_contents: #!/usr/bin/env node
  
  'use strict';
  
  var program = require('commander');
  var lc = require('linear-converter');
  
  program
    .version('0.0.1')
    .usage('<number> [options]')
    .option('-n, --negative', 'Treat <number> as negative')
    .option('-u, --unit [unit]', 'Unit for the preset')
    .option('-p, --preset [preset]', 'Name of the preset to use')
    .parse(process.argv);
  
  var x = Number(program.args[0]);
  
  if (program.negative) {
    x = -x;
  }
  
  console.log(lc.convert(x, lc.PRESETS[program.unit][program.preset]));
  
subject: add shebang