Attempt to fix gaussian calc to be correct wrt note

Author: fantasai

css3-background/Overview.html

@@ -3780,7 +3780,7 @@ <h3 id=the-box-shadow><span class=secno>7.2. </span>The &lsquo;<a
    however the resulting shadow must approximate (with each pixel being
    within 5% of its expected value) the image that would be generated by
    applying to the shadow a Gaussian blur with a standard deviation equal to
-   the blur radius
+   the half the blur radius
 
   <p class=note>Note this means for a long, straight shadow edge, the blur
    radius will create a visibly apparent color transition approximately the

css3-background/Overview.src.html

@@ -2757,7 +2757,7 @@ <h3 id="the-box-shadow">The 'box-shadow' property</h3>
 defined; however the resulting shadow must approximate (with each pixel
 being within 5% of its expected value) the image that would be generated
 by applying to the shadow a Gaussian blur with a standard deviation equal
-to the blur radius
+to the half the blur radius
 
 <p class="note">Note this means for a long, straight shadow edge, the
 blur radius will create a visibly apparent color transition approximately

css3-background/issues-lc-2009.html

@@ -33,15 +33,15 @@ <h1>CSS Backgrounds and Borders Level 3 Disposition of Comments</h1>
 Response: <a href="http://lists.w3.org/Archives/Public/www-style/2009Nov/0263.html">http://lists.w3.org/Archives/Public/www-style/2009Nov/0263.html</a>
 Closed:   Accepted
 </pre>
-<pre class="r" id="issue-1">
+<pre class="r" id="issue-2">
 Issue 2.
 Summary:  Add background-opacity
 From:     Patrick H. Lauke
 Comment:  <a href="http://lists.w3.org/Archives/Public/www-style/2009Oct/0068.html">http://lists.w3.org/Archives/Public/www-style/2009Oct/0068.html</a>
 Response: <a href="http://lists.w3.org/Archives/Public/www-style/2009Nov/0266.html">http://lists.w3.org/Archives/Public/www-style/2009Nov/0266.html</a>
 Closed:   Rejected
 </pre>
-<pre class="r" id="issue-1">
+<pre class="r" id="issue-3">
 Issue 3.
 Summary:  Allow more slashes in border-image shorthand
 From:     Zack Weinberg
@@ -50,7 +50,7 @@ <h1>CSS Backgrounds and Borders Level 3 Disposition of Comments</h1>
 Closed:   Rejected
 Comment:  <a href="http://lists.w3.org/Archives/Public/www-style/2009Nov/0273.html">http://lists.w3.org/Archives/Public/www-style/2009Nov/0273.html</a>
 </pre>
-<pre class="a" id="issue-1">
+<pre class="a" id="issue-4">
 Issue 4.
 Summary:  Rename box-break keywords
 From:     fantasai