adding a note to the docs about colon/equals equality

documentation/index.html.erb

@@ -294,7 +294,8 @@ print reverse 'tpircseeffoc'</textarea>
       <b class="header">Assignment</b>
       Use a colon <tt>:</tt> to assign, as in
       <a href="http://json.org">JSON</a>. Equal signs are only needed for
-      mathy things.
+      mathy things. While colons are preferred, the two may be used interchangeably, 
+      even within object literals.
     </p>
     <%= code_for('assignment', 'greeting') %>
     <p>

index.html

@@ -407,7 +407,8 @@ cube = function cube(x) {
       <b class="header">Assignment</b>
       Use a colon <tt>:</tt> to assign, as in
       <a href="http://json.org">JSON</a>. Equal signs are only needed for
-      mathy things.
+      mathy things. While colons are preferred, the two may be used interchangeably, 
+      even within object literals.
     </p>
     <div class='code'><pre class="idle"><span class="FunctionName">greeting</span><span class="Keyword">:</span> <span class="String"><span class="String">&quot;</span>Hello CoffeeScript<span class="String">&quot;</span></span>
 <span class="FunctionName">difficulty</span><span class="Keyword">:</span> <span class="Number">0.5</span>