note about import scala.language.postfixOps

Author: toy

_overviews/cheatsheets/index.md

@@ -71,7 +71,7 @@ permalink: /cheatsheets/index.html
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       <td><span class="label success">Good</span><br> <pre class="highlight"><code>(1 to 5).map(2 *)</code></pre><br /> <span class="label important">Bad</span><br> <pre class="highlight"><code>(1 to 5).map(* 2)</code></pre></td>
-      <td>anonymous function: bound infix method.<br /> Use <code class="highlighter-rouge">2 * _</code> for sanity’s sake instead.</td>
+      <td>anonymous function: bound infix method.<br /> Use <code class="highlighter-rouge">2 * _</code> for sanity’s sake instead.<br />Will require <code>import scala.language.postfixOps</code> in the future.</td>
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       <td><pre class="highlight"><code>(1 to 5).map { x =&gt;