[css-shapes] clarify inset prose

Author: astearns

css-shapes/Overview.html

@@ -63,7 +63,7 @@
 </p>
   <h1 class="p-name no-ref" id=title>CSS Shapes Module Level 1</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=20140122>22 January 2014</span></span></span></h2>
+    <span class=dt-updated><span class=value-title title=20140128>28 January 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-shapes/>http://dev.w3.org/csswg/css-shapes/</a><dt>Latest version:<dd><a href=http://www.w3.org/TR/css-shapes/>http://www.w3.org/TR/css-shapes/</a><dt>Editor’s Draft:<dd><a href=http://dev.w3.org/csswg/css-shapes/>http://dev.w3.org/csswg/css-shapes/</a>
     <dt>Feedback:</dt>
         <dd><a href="mailto:www-style@w3.org?subject=%5Bcss-shapes%5D%20feedback">www-style@w3.org</a>
@@ -432,7 +432,8 @@ <h3 class="heading settled heading" data-level=3.1 id=supported-basic-shapes><sp
 			Defines an inset rectangle.
 			<ul>
 				<li>
-					The first four arguments represent the
+					When all of the first four arguments 
+					are supplied they represent the
 					<strong>top, right, bottom</strong> and
 					<strong>left</strong> offsets
 					from the <a data-link-type=dfn href=#reference-box title="reference box">reference box</a> inward

css-shapes/Overview.src.html

@@ -311,7 +311,8 @@ <h3 id="supported-basic-shapes">
 			Defines an inset rectangle.
 			<ul>
 				<li>
-					The first four arguments represent the
+					When all of the first four arguments 
+					are supplied they represent the
 					<strong>top, right, bottom</strong> and
 					<strong>left</strong> offsets
 					from the <a>reference box</a> inward