title: escaping dash in username
body: <p>I'm having difficulty modifying a postgres user that contains a dash in its name - I've run into this problem several times, but can never find the answer (no matter how much googling I do!).</p>
  <blockquote>
  <p>osm=# grant all on osm_polygon_view to www-data;</p>
  <p>ERROR:  syntax error at or near &quot;-&quot;</p>
  <p>LINE 1: grant all on osm_polygon_view to www-data;</p>
  <pre><code>                                       ^
  </code></pre>
  </blockquote>
  <p>I have tried just about every permutation of escape characters and quotes, and still can't get this to work. I have also encountered this when trying to change www-data password.</p>