add usage printing example to readme

README.md

@@ -35,6 +35,13 @@ for [node.js](http://nodejs.org/) and [npm](http://github.com/isaacs/npm):
 By default, nomnom parses [node](http://nodejs.org/)'s `process.argv`. You can also pass in the args:
 	var options = nomnom.parseArgs(opts, {}, ["-xvf", "--atomic=true"])
 
+Values are JSON parsed, so `--debug=true --count=3 --file=log.txt` would give you:
+	{ debug: true,
+	  count: 3,
+	  file: "log.txt"
+	}
+
+### positional args
 All parsed arguments that don't fit the `-a` or `--atomic` format and aren't attached to an option are positional and can be matched on via the `position`:
 	var opts = {
 	  filename: {
@@ -45,13 +52,42 @@ All parsed arguments that don't fit the `-a` or `--atomic` format and aren't att
 	var options = nomnom.parseArgs(opts);
 
 	sys.puts(options.filename);
-
-Values are JSON parsed, so `--debug=true --count=3 --file=log.txt` would give you:
-	{ debug: true,
-	  count: 3,
-	  file: "log.txt"
+
+### printing usage
+Nomnom prints out a usage message if `--help` or `-h` is an argument. You can disable this with the `printHelp` flag and specify the printing function with `printFunc` if you're not using node:
+
+	nomnom.parseArgs(opts, { printHelp: false });
+
+Usage for these options in `test.js`:
+	var options = {
+	  command: {
+	    position: 0,
+	    help: "either 'test', 'run', or 'xpi'" 
+	  },
+	  config: {
+	    string: '-c FILE, --config=FILE',
+	    help: 'json file with tests to run',
+	  },
+	  debug: {
+	    string: '-d, --debug',
+	    help: 'use debug mode'
+	  }
 	}
+
+...would look like this:
+	Usage: node test.js <command> [options]
+
+	<command>		either 'test', 'run', or 'xpi'
+
+	options:
+	-c FILE, --config=FILE		json file with tests to run
+	-d, --debug		use debug mode
+
+Nomnom can't detect the alias used to run your script. You can use the `script` option to print the correct name instead of e.g. `node test.js`:
+	nomnom.parseArgs(opts, { script : "test" });
+
+
+
+
 
-Nomnom prints out a usage message if `--help` or `-h` is an argument. You can disable this with the `printHelp` flag and specify the printing function with `printFunc` if you're not using node:
 
-	nomnom.parseArgs(opts, {printHelp: false});

lib/nomnom.js

@@ -107,7 +107,7 @@ ArgParser.prototype = {
   helpString : function() {
     var script = this.script || process.argv[0] + " "
       + require('path').basename(process.argv[1]);
-    var str = "usage: " + script;
+    var str = "Usage: " + script;
 
     var positionals = this.options.filter(function(opt) {
       return opt.position != undefined;
@@ -121,13 +121,13 @@ ArgParser.prototype = {
     str += " [options]\n\n";
 
     positionals.forEach(function(pos) {
-      str += pos.name + "\t" + (pos.help || "") + "\n"; 
+      str += "<" + pos.name + ">\t\t" + (pos.help || "") + "\n"; 
     });
     str += "\noptions:\n"
 
     this.options.forEach(function(option) {
       if(option.position == undefined)
-        str += option.string + "\t" + (option.help || "") + "\n";
+        str += option.string + "\t\t" + (option.help || "") + "\n";
     });
     return str;
   }