title: Opa bootstrap samples
body: <p>I'm trying to make Twitter's Bootstrap API (http://bootstrap.opalang.org/) work in Opa by trying some features, and there is one that refuse to work : the WB.grid system. More precisely, the parser report a syntax error when I try to do that : </p>
  
  <pre><code>    grid_basic = (WBootstrap.Grid.row([
          {span=8 offset=none content=&lt;&gt;foo&lt;/&gt;},
          {span=8 offset=none content=&lt;&gt;bar&lt;/&gt;}
          ]))
  </code></pre>
  
  <p>(that is, a simple row with two cells)</p>
  
  <p>Here's the error string :</p>
  
  <pre><code>            grid_basic = (WBootstrap.Grid.row([
                      {--&gt;span=8 offset=none content=&lt;&gt;foo&lt;/&gt;},
                      {span=8 offset=none content=&lt;&gt;bar&lt;/&gt;}
                      ]))
  
              Hint: File "test1.opa", line 9, characters 4-10, (9:4-9:10 | 158-164),
              found a binding as condition. Did you mean `==' rather than `=' ?
  </code></pre>
  
  <p>After a while I just copy pasted the whole code of a sample page (http://bootstrap.opalang.org/html/src/container_app.opa.html), and it failed on the "grid" line too. 
  I tried both the new and old parser. Is there something I'm doing wrong ?</p>