Update information about 3/4 = 0 or not

docs/visual/float.html

@@ -98,7 +98,7 @@
         <h1 class="Heading-1"> <font color="#0000A0">Floating Division</font></h1>
       </div>
       <div>
-        <p class="Normal"> By default, Python performs integer division with truncation, 
+        <p class="Normal"> For versions of Python prior to 3.0, Python performs integer division with truncation, 
           so that 3/4 is 0, not 0.75. This is inconvenient when doing scientific computations, 
           and can lead to hard-to-find bugs in programs. You can write 3./4., which 
           is 0.75 by the rules of &quot;floating-point&quot; division. </p>
@@ -108,6 +108,7 @@ <h1 class="Heading-1"> <font color="#0000A0">Floating Division</font></h1>
         <p class="program">from __future__ import division</p>
         <p class="Normal">There are two underscores (&quot;_&quot; and &quot;_&quot;) 
           before &quot;future&quot; and two after. </p>
+        <p class="Normal">Starting with Python 3.0, 3/4 means 0.75 and <strong>from __future__ import division</strong> is no longer needed and is ignored. You may wish to include this statement, however, so that your program will run correctly on earlier versions of Python.</p>
         <p class="Normal">The Visual module converts integers to floating-point numbers 
           for you when specifying attributes of objects:</p>
         <div>