add example, DRY regex, fix indentation

Author: SergioCrisostomo

Gruntfile.js

@@ -59,7 +59,7 @@ module.exports = function(grunt) {
       multipackage_partial_exclude: {
         options: {
           only: 'ProjectB/*',
-		  exclude: ['ProjectA/*'],
+          exclude: ['ProjectA/*'],
           name: {
             ProjectB: 'test/fixtures/Project_B',
             ProjectA: 'test/fixtures/Project_A'

README.md

@@ -145,8 +145,28 @@ grunt.initConfig({
 
 #### options.exclude
 Type: `Array`
+Syntax: `['PackageNameA/*'<, 'PackageNameB/*', ...>] `
 
 The specific dependencies packages to exclude from the compilation.
+For example, adding `exclude: ['Core/*']` in the Gruntfile options would exclude all Core dependencies from output file.
+
+```js
+grunt.initConfig({
+  packager: {
+    options: {
+      name: {
+        Core: 'js/mootools-core',
+        More: 'js/mootools-more'
+      },
+      exclude: ['Core/*']
+    },
+    all: {
+      'dest/mootools.js': 'Source/**.js',
+    }
+  }
+});
+```
+
 
 ### Other Usage Examples
 

tasks/packager.js

@@ -170,7 +170,7 @@ module.exports = function(grunt) {
 				var toExclude = toArray(options.exclude); 
 				buffer = buffer.filter(function(def){
 					var shouldKeep = toExclude.filter(function(dependency){
-						var match = dependency.match(/([^\*]+)/);
+						var match = dependency.match(PACKAGE_DOT_STAR);
 						return match ? def.key.indexOf(match[1]) != 0 : true;
 					});
 					return shouldKeep.length;