[css-counter-styles] heading grammar

--HG--
extra : rebase_source : b88907624bd980d0a3e6ef868a3587a8f7572a9d

Author: fantasai

css-counter-styles/Overview.bs

@@ -667,7 +667,7 @@ Accumulating Numerals: the ''additive'' system</h4>
 -->
 
 <h4 id="extends-system">
-Building Off Of Existing Counter Styles: the ''extends'' system
+Building from Existing Counter Styles: the ''extends'' system
 <span id='override-system'></span></h4>
 
 	The <dfn value for="@counter-style/system">extends</dfn> system allows an author to use the algorithm of another counter style,

css-counter-styles/Overview.html

@@ -59,7 +59,7 @@
 </p>
   <h1 class="p-name no-ref" id=title>CSS Counter Styles 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=20140813>13 August 2014</span></span></span></h2>
+    <span class=dt-updated><span class=value-title title=20140814>14 August 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-counter-styles/>http://dev.w3.org/csswg/css-counter-styles/</a>
@@ -136,7 +136,7 @@ <h2 class="no-num no-toc no-ref heading settled heading" id=contents><span class
 			<li><a href=#alphabetic-system><span class=secno>3.1.4</span>  Bijective Numerals: the <span class=css data-link-type=maybe title=alphabetic>alphabetic</span> system</a>
 			<li><a href=#numeric-system><span class=secno>3.1.5</span>  Positional Numerals: the <span class=css data-link-type=maybe title=numeric>numeric</span> system</a>
 			<li><a href=#additive-system><span class=secno>3.1.6</span>  Accumulating Numerals: the <span class=css data-link-type=maybe title=additive>additive</span> system</a>
-			<li><a href=#extends-system><span class=secno>3.1.7</span>  Building Off Of Existing Counter Styles: the <span class=css data-link-type=maybe title=extends>extends</span> system <span></span></a></ul>
+			<li><a href=#extends-system><span class=secno>3.1.7</span>  Building from Existing Counter Styles: the <span class=css data-link-type=maybe title=extends>extends</span> system <span></span></a></ul>
 		<li><a href=#counter-style-negative><span class=secno>3.2</span>  Formatting negative values: the <span class=property data-link-type=propdesc title=negative>negative</span> descriptor</a>
 		<li><a href=#counter-style-prefix><span class=secno>3.3</span>  Symbols before the marker: the <span class=property data-link-type=propdesc title=prefix>prefix</span> descriptor</a>
 		<li><a href=#counter-style-suffix><span class=secno>3.4</span>  Symbols after the marker: the <span class=property data-link-type=propdesc title=suffix>suffix</span> descriptor</a>
@@ -746,7 +746,7 @@ <h4 class="heading settled heading" data-level=3.1.6 id=additive-system><span cl
 
 
 <h4 class="heading settled heading" data-level=3.1.7 id=extends-system><span class=secno>3.1.7 </span><span class=content>
-Building Off Of Existing Counter Styles: the <a class=css data-link-type=maybe href=#valuedef-counter-stylesystem-extends title=extends>extends</a> system
+Building from Existing Counter Styles: the <a class=css data-link-type=maybe href=#valuedef-counter-stylesystem-extends title=extends>extends</a> system
 <span id=override-system></span></span><a class=self-link href=#extends-system></a></h4>
 
 <p>The <dfn class=css-code data-dfn-for=@counter-style/system data-dfn-type=value data-export="" id=valuedef-counter-stylesystem-extends>extends<a class=self-link href=#valuedef-counter-stylesystem-extends></a></dfn> system allows an author to use the algorithm of another counter style,