title: dplyr & r: Anonymous functions myst be parenthesized
body: <p>I think I've stumbled apon my first error with a spelling mistake. </p>
  
  <p>I am running the following code with R and dplyr.</p>
  
  <pre><code>&gt; foobar = c(1,2,3)
  &gt; foobar %&gt;% as.character
  [1] "1" "2" "3"
  </code></pre>
  
  <p>This works fine, now I try to run it through an anonymous function. </p>
  
  <pre><code>&gt; foobar %&gt;% function(x) x * 2 
  Error: Anonymous functions myst be parenthesized
  </code></pre>
  
  <p>Any idea what is happening? (And where I need to ping to get 'myst' corrected to 'must')?</p>