function-type on a string constant

```JavaScript
var server = (…) ? 'http://test/' : 'http://production/';
angular.module('myMod', […]).constant('server', server);
```
gives me a `Use anonymous functions instead of named function angular/function-type`.

I tried with:
```JavaScript
angular.module('myMod', […]).constant('server', function () {
return (…) ? 'http://test/' : 'http://production/';
});
```
but that returns the literal function, not the value.

What's the suggested approach here?