title: Using my with parentheses and only one variable
body: <p>I sometimes see Perl code like this:</p>
  
  <pre><code>my ( $variable ) = blah....
  </code></pre>
  
  <p>What is the point of putting parentheses around a single variable?  I thought parentheses were only used when declaring multiple variables, like:</p>
  
  <pre><code>my ( $var1, $var2, $var3 ) = blah...
  </code></pre>