[css-multicol] Remove at-risk flag for length-percentage in column-gap

Author: rachelandrew

css-multicol-1/Overview.bs

@@ -22,7 +22,6 @@ Editor: Rachel Andrew, Fronteers, https://rachelandrew.co.uk, w3cid 81117
 Issue Tracking: Disposition of Comments https://drafts.csswg.org/css-multicol-1/issues
 Abstract: This specification describes multi-column layouts in CSS, a style sheet language for the web. Using functionality described in the specification, content can be flowed into multiple columns with a gap and a rule between them.
 Link Defaults: css-color (property) color, css2 (property) max-height, css-backgrounds-3 (value) hidden
-At Risk: column-gap accepting <<length-percentage>> instead of <<length>>
 </pre>
 <pre class="link-defaults">
 spec:css-sizing-3; type:property; text:min-height
@@ -1410,6 +1409,7 @@ This appendix is <em>informative</em>.
 
 <h3 id="changes-from-20180528">Changes from the <a href="https://www.w3.org/TR/2018/WD-css-multicol-1-20180528/">Working Draft (WD) of 28 May 2018</a></h3>
 <ul>
+	<li>Removed the at-risk marker from the length-percentage value for 'column-gap'. <a href="https://github.com/w3c/csswg-drafts/issues/3988">Resolved 4 June 2019.</a></li>
 	<li>Added the paragraph "In continuous contexts, this property will only be consulted if the length of columns has been constrained in the block dimension, including min and max constraints (e.g., 'height', 'min-height', 'max-height'). Otherwise, columns will automatically be balanced." This paragraph (without the additional detail regarding min and max constraints) was commented out in 2012, causing an interoperability issue. Also corrected the example of content ending up all in the first column, by adding the height constraint. Resolved <a href="https://github.com/w3c/csswg-drafts/issues/3224#issuecomment-468089503">28 February 2019</a></li>
 	<li>Updated the introduction to remove mention of the benefits of multicol over using tables for layout and instead refer to the unique characteristics of multicol. Editorial change referenced in <a href="https://github.com/w3c/csswg-drafts/issues/3654">issue 3654</a>.</li>
 	<li>Changed the sentence added in the pseudo-algorithm section after the 7 Jan 2016 resolution, to refer to <em>columns</em> and not <em>tracks</em> as tracks are not defined in this specification. Resolved <a href="https://github.com/w3c/csswg-drafts/issues/3649#issuecomment-472505520">13 March 2019</a>.</li>