[css-backgrounds-3] s/not allowed/invalid/

Author: fantasai

css-backgrounds-3/Overview.bs

@@ -959,7 +959,7 @@ layer.
     neither an intrinsic width nor an intrinsic height, its size is
     determined as for ''contain''.
 
-    <p>Negative values are not allowed.
+    <p>Negative values are invalid.
   </dd>
 </dl>
 
@@ -1663,7 +1663,7 @@ are not specified, but the values are constant throughout a
 <span>document</span> and thin &le; medium &le; thick. A UA could,
 e.g., make the thickness depend on the ''medium'' font size: one
 choice might be 1, 3 &amp; 5px when the ''medium'' font size is 17px or
-less. Negative values are not allowed.
+less. Negative values are invalid.
 
 <p>The 'border-width' property is a shorthand property for setting
 'border-top-width', 'border-right-width', 'border-bottom-width', and 'border-left-width'
@@ -1883,7 +1883,7 @@ radius. If the second value is omitted it is copied from the first.
 If either length is zero, the corner is square, not rounded.
 Percentages for the horizontal radius refer to the width of the
 border box, whereas percentages for the vertical radius refer to
-the height of the border box. Negative values are not allowed.
+the height of the border box. Negative values are invalid.
 
 <div class="figure">
   <p><img alt="Diagram of the inscribed ellipse" src="images/corner.png">
@@ -2327,7 +2327,7 @@ they apply to the top, right, bottom, and left, respectively.
     i.e., treated as empty.)
 </dl>
 
-<p>Negative values are not allowed.
+<p>Negative values are invalid.
 Computed values larger than the size of the image are interpreted as ''100%''.
 
 <p>The regions given by the 'border-image-slice' values may overlap.
@@ -2421,7 +2421,7 @@ Values have the following meanings:</p>
     instead.
 </dl>
 
-<p>Negative values are not allowed for any 'border-image-width' values.
+<p>Negative values are invalid for any 'border-image-width' values.
 
 <p>If two opposite 'border-image-width' offsets are large enough that
 they overlap, then the used values of all 'border-image-width' offsets
@@ -2488,7 +2488,7 @@ they apply to the top, right, bottom, and left, respectively.
   <dd>Represents an outset of the specified multiple of the corresponding computed <a href="#the-border-width">border-width</a>.
 </dl>
 
-<p>Negative values are not allowed.
+<p>Negative values are invalid.
 
 <p>Portions of the border-image that are rendered outside the border
 box do not trigger scrolling. Also such portions are invisible to mouse
@@ -2753,7 +2753,7 @@ has been moved to the <a href="https://www.w3.org/TR/css3-break/">CSS Fragmentat
 
     <dt><dfn id="shadow-blur-radius">3rd <<length [0,&infin;]>></dfn>
     <dd>Specifies the <dfn>blur radius</dfn>.
-      Negative values are not allowed.
+      Negative values are invalid.
       If the blur value is zero, the shadow’s edge is sharp.
       Otherwise, the larger the value, the more the shadow’s edge is blurred.
       See <a href="#shadow-blur">Shadow Blurring</a>, below.
@@ -3090,7 +3090,10 @@ Changes since the 17 October 2017 Candidate Recommendation</h3>
     in the property definition tables.
   <li>
     Changed syntax to use <a>bracketed range notation</a>
-    to reflect the prose restrictions on negative values.
+    to reflect the prose restrictions on negative values,
+    and corrected a few grammar definition errors introduced in the previous publication.
+  <li>
+    Minor editorial improvements.
 </ul>
 
 <h3 id="changes-2014-09">
@@ -3187,10 +3190,10 @@ review period. For details, see the full <a href="https://drafts.csswg.org/css-b
   property reset.
 
   <li><a href="#the-border-width">Section 4.3</a>: Added that negative
-  lengths are not allowed on 'border-width'.
+  lengths are invalid on 'border-width'.
 
   <li><a href="#the-border-radius">Section 5.1</a>: Added that
-  negative lengths are not allowed on 'border-radius'.
+  negative lengths are invalid on 'border-radius'.
 
   <li><a href="#border-image-tables">Section 6.8</a>: Added a section
   about the effect of 'border-image' on tables with collapsed borders