title: Angular 1 - concatenate model with string in expression
body: <p>Is there a possibility of having this writing in an expression with ecmaScript 2015 for example, it is especially the <code>||</code> that cause problem i think</p>
  
  <pre><code>{{ ::$ctrl.realEstateProjectCurrentProduct.housingTax + ' €' || $ctrl.noDataMessage }}
  </code></pre>