One-time bindings in templates doesn't work with a space on beginning
<p>I have a very strange problem with One-time bindings in templates.
In definition if I want to use it, I need to starting an expression with ::.</p>

<pre><code>{{ ::expression }}
</code></pre>

<p>Normally it should works, but for me stopped working. If I remove space before :: and do something like:</p>

<pre><code>{{:: expression }}
</code></pre>

<p>It works. No idea why. To check how many watchers are created I use a AngularJS Batarang for Chrome and own JS script to calculate watchers. The both works the same.
I think that the both tools works correctly, because I see that when amount of watchers is big, the app works very slow.</p>

<p>Does anyone has something similar? Thanks!</p>