[MathML3-last-call] mlongdiv example has a mistake

In the long division example in 3.6.8.3, the line

<mn> 1.0</mn>

should not be inside the msgroup with position='-1'.  The decimal point
essentially changes the alignment some, and in this case, it should have
position='0'.  To do this, it should move up into the previous msgroup.

Here's what I think it should be:

<mlongdiv longdivstyle="stackedrightright">
  <mn> 435.3</mn>
  <mn> 3 </mn>

  <mn> 1306</mn>

  <msgroup position="2" shift="-1">
    <msgroup>
      <mn> 12</mn>
      <msline length="2"/>
    </msgroup>
    <msgroup>
      <mn> 10</mn>
      <mn> 9</mn>
      <msline length="2"/>
    </msgroup>
    <msgroup>
      <mn> 16</mn>
      <mn> 15</mn>
      <msline length="2"/>
      <mn> 1.0</mn>             <!-- the '.' preserves alignment of 1.0 as
opposed to '10'-->
   </msgroup>
   <msgroup position='-1'>      <!-- extra shift to move to the right of the
"." -->
       <mn> 9</mn>
      <msline length="3"/>
      <mn> 1</mn>
    </msgroup>
  </msgroup>
</mlongdiv>