[css-multicol] Tidying up changes list and DoC

Author: rachelandrew

css-multicol-1/Overview.bs

@@ -1206,10 +1206,10 @@ This appendix is <em>informative</em>.
 
 <h3 id="changes-from-20171005">Changes from the <a href="https://www.w3.org/TR/2017/WD-css-multicol-1-20171005/">Working Draft (WD) of 5 October 2017</a></h3>
 <ul>
-	
 	<li>Replaced the HTML mock-up examples with SVG versions, as the examples were unclear. <a href="https://github.com/w3c/csswg-drafts/issues/1087">Issue 1087</a>.</li>
 	<li>Changed the value of normal for column-gap to be 1em, rather than a UA-specified length with a suggestion of 1em. <a href="https://github.com/w3c/csswg-drafts/issues/2145#issuecomment-378781507">Resolved: 4 Apr 2018</a></li>
 	<li>Clarified that negative values are not allowed for column-width, and that while 0 may be specified, used values will be clamped to a minimum of 1px. <a href="https://github.com/w3c/csswg-drafts/issues/1741#issuecomment-373091628">Resolved: 14 Mar 2018</a></li>
+	<li>Clarified that where there is a spanning element content is automatically balanced across all columns in the immediately preceding column row before the element appears. <a href="https://github.com/w3c/csswg-drafts/issues/1075">Resolved: 9 Nov 2017</a></li>
 	<li>Added clarification plus an additional example that spanning elements may be lower the the first level of descendents, and that in the case of margins, borders and padding on the element containing the spanning, this would be drawn above the spanner. <a href="https://github.com/w3c/csswg-drafts/issues/1072#issuecomment-342668025">Resolved: 8 Nov 2017</a></li>
     <li>Changed the sentence <em>Column rules are painted in the inline content layer, but below all inline content inside the multicol element.</em> to <em>Column rules are painted just above the border of the multicol element. For scrollable multicol elements, note that while the border and background of the multicol element obviously aren’t scrolled, the rules need to scroll along with the columns.</em> <a href="https://github.com/w3c/csswg-drafts/issues/1739#issuecomment-342659978">Resolved: 7 Nov 2017</a></li>
 	<li>Under section The Multi-column Model, removed two sentences <em>That is, column boxes behave like block-level, table cell, and inline-block boxes as per CSS 2.1, section 10.1, item 2 CSS21. However, column boxes do not establish block container boxes for elements with ''position: fixed or position: absolute''.</em>. THese were replaced with a clarification about the principal box and a new example showing how abspos elements refer to the multicol container. <a href="https://github.com/w3c/csswg-drafts/issues/1738#issuecomment-342661881">Resolved: 7 Nov 2017</a></li>
@@ -1222,7 +1222,7 @@ This appendix is <em>informative</em>.
 <a href="https://www.w3.org/TR/2011/CR-css3-multicol-20110412/">Candidate Recommendation (CR) of 12 April 2011</a>.</h3>
 
 <ul>
-	<li>Added July 2016 resolution to change the the track size floor to a required UA-specified value, consistent with the CSS Grid spec.
+	<li>Added July 2016 resolution to change the the track size floor to a required UA-specified value, consistent with the CSS Grid spec. <a href="https://lists.w3.org/Archives/Public/www-style/2016Jan/0031.html">Resolved: 7 Jan 2016</a>
     <li>Remove the restriction about overflow columns only being in continuous media in the statement that 'column-fill' has no effect on overflow columns. <a href="https://lists.w3.org/Archives/Public/www-style/2013Sep/0471.html">Resolved: September 2013</a>.
 	<li>Added keyword balance-all and examples to demonstrate how this should work. <a href="https://lists.w3.org/Archives/Public/www-style/2013Sep/0471.html">Resolved: September 2013</a>.
 	<li> The pseudo-algorithm has been revised on a number of occasions. <a href="https://lists.w3.org/Archives/Public/www-style/2013Feb/0471.html">Latest change Feb 2013</a>.