Code insertion following = (equals)

Code insertation following a '=' does not need a space.

``` php
-for ($i = 0; $i < 5; $i++)
  =$i
```

should work. in PhpHaml however the resulting template is this:

``` php
-for ($i = 0; $i < 5; $i++)
  <div><?php echo ; ?>
</div>
```
