Changed 'bin/usage.txt' to 'bin/usage.js'

This change ensures the usage text always has LF line ending on Linux

bin/options.js

@@ -193,7 +193,7 @@ while ( args.length > 0 ) {
 
         case "-h":
         case "--help":
-            console.log( fs.readFileSync( path.join( __dirname, "usage.txt" ), "utf8" ).trim() );
+            console.log( require( "./usage" ) );
             process.exit();
             break;
 

bin/usage.js

@@ -1,3 +1,6 @@
+"use strict";
+
+module.exports = `
 Usage: pegjs [options] [<input_file>] [--]
 
 Options:
@@ -49,3 +52,4 @@ Options:
     --trace                        Enable tracing in generated parser
 
 -v, --version                      Print version information and exit
+`;