[css-text] margins (in addition to borders/padding) also block hanging. Because I can't think why margins/padding should be different here. <http://lists.w3.org/Archives/Public/www-style/2013Nov/0178.html>

Author: fantasai

css-text/Overview.bs

@@ -2296,7 +2296,7 @@ Word Spacing: the 'word-spacing' property</h3>
 
     <p>When a punctuation mark <dfn title="hang">hangs</dfn>, it is not considered
       when measuring the line's contents for fit, alignment, or justification.
-      Depending on the line's alignment, this may (or may not)
+      Depending on the line's alignment/justification, this can
       result in the mark being placed outside the line box.
 
     <p>Values have the following meanings:</p>
@@ -2320,7 +2320,7 @@ Word Spacing: the 'word-spacing' property</h3>
           does not otherwise fit prior to justification.</dd>
     </dl>
 
-    <p>Non-zero start and end borders/padding between
+    <p>Non-zero start and end borders/padding/margins between
       a <i>hang</i>able mark and the edge of the line prevent the mark from hanging.
       For example, a period at the end of an inline box with end padding
       does not <i>hang</i> at the end edge of a line.

css-text/Overview.html

@@ -104,7 +104,7 @@
 </p>
   <h1 class="p-name no-ref" id=title>CSS Text Module Level 3</h1>
   <h2 class="no-num no-toc no-ref heading settled heading" id=subtitle><span class=content>Editor’s Draft,
-    <span class=dt-updated><span class=value-title title=20140710>10 July 2014</span></span></span></h2>
+    <span class=dt-updated><span class=value-title title=20140721>21 July 2014</span></span></span></h2>
   <div data-fill-with=spec-metadata><dl>
 	<dt>This version:
 	<dd><a class=u-url href=http://dev.w3.org/csswg/css-text-3/>http://dev.w3.org/csswg/css-text-3/</a>
@@ -2430,7 +2430,7 @@ <h3 class="heading settled heading" data-level=9.2 id=hanging-punctuation-proper
 
     <p>When a punctuation mark <dfn data-dfn-type=dfn data-noexport="" id=hang title=hang>hangs<a class=self-link href=#hang></a></dfn>, it is not considered
       when measuring the line’s contents for fit, alignment, or justification.
-      Depending on the line’s alignment, this may (or may not)
+      Depending on the line’s alignment/justification, this can
       result in the mark being placed outside the line box.
 
     <p>Values have the following meanings:</p>
@@ -2454,7 +2454,7 @@ <h3 class="heading settled heading" data-level=9.2 id=hanging-punctuation-proper
           does not otherwise fit prior to justification.</dd>
     </dl>
 
-    <p>Non-zero start and end borders/padding between
+    <p>Non-zero start and end borders/padding/margins between
       a <a data-link-type=dfn href=#hang title=hang>hang</a>able mark and the edge of the line prevent the mark from hanging.
       For example, a period at the end of an inline box with end padding
       does not <a data-link-type=dfn href=#hang title=hang>hang</a> at the end edge of a line.