Update typos in command-line app

Author: frostney

cli.js

@@ -5,26 +5,26 @@ const createLibrary = require('./lib');
 const pkg = require('./package.json');
 
 program.version(pkg.version)
-  .usage('[options] <file ...>')
+  .usage('[options] <name>')
   .option('-p, --prefix <prefix>',
-    'The prefix for the library (Default: RN)')
+    'The prefix for the library (Default: `RN`)')
   .option('--module-prefix <modulePrefix>',
-    'The module prefix for the library (Default: react-native)')
+    'The module prefix for the library (Default: `react-native`)')
   .option('--package-identifier <packageIdentifier>',
-    'The package name for the Android module (Default: com.reactlibrary)')
+    '(Android only!) The package name for the Android module (Default: `com.reactlibrary`)')
   .option('--namespace <namespace>',
-    'The namespace for the Windows module' +
+    '(Windows only!) The namespace for the Windows module\n' +
     ' (Default: The package identifier as PascalCase, which is `Com.Reactlibrary`)')
   .option('--platforms <platforms>',
-    'Platforms the library will be created for. (comma separated; default: ios,android,windows')
+    'Platforms the library will be created for. (comma separated; default: `ios,android,windows`)')
   .parse(process.argv);
 
 const name = program.args[0];
 const prefix = program.prefix;
 const modulePrefix = program.modulePrefix;
 const packageIdentifier = program.packageIdentifier;
 const namespace = program.namespace;
-const platforms = (program.platforms || '').split(',');
+const platforms = (program.platforms) ? program.platforms.split(',') : program.platforms;
 
 const beforeCreation = Date.now();
 createLibrary({