fd6bac7de5
Before this change,
```js
$routeProvider.when('/foo/:bar|?', { ... });
```
would not have the expected effect --- the parameter would not be optional, and
the pipe would not be included in the parameter name.
Following this change, the presence of the pipe operator will typically cause an
exception to be thrown due to the fact that the generated regexp is invalid.
The net result of this change is that ? and * operators will not be masked, and
pipe operators will need to be removed, although it's unexpected that these are
being used anywhere.
Closes #5920
AngularJS 
AngularJS lets you write client-side web applications as if you had a smarter browser. It lets you use good old HTML (or HAML, Jade and friends!) as your template language and lets you extend HTML’s syntax to express your application’s components clearly and succinctly. It automatically synchronizes data from your UI (view) with your JavaScript objects (model) through 2-way data binding. To help you structure your application better and make it easy to test, AngularJS teaches the browser how to do dependency injection and inversion of control. Oh yeah and it also helps with server-side communication, taming async callbacks with promises and deferreds; and makes client-side navigation and deeplinking with hashbang urls or HTML5 pushState a piece of cake. The best of all: it makes development fun!
- Web site: http://angularjs.org
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Building AngularJS
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Running Tests
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