[css-device-adapt] Fix awkward grammar.

Author: tabatkins

css-device-adapt/Overview.bs

@@ -1386,15 +1386,17 @@ they always have.
 <h3 id="large-screen-ua">
 Large screen UA styles</h3>
 
-For browsers with an initial viewport size large enough to fit common
-websites without breaking the layout, or which can easily to resized
-to do so, the recommendation is to have <em>no</em> UA styles. That
-means that it will have all descriptors initially set to ''viewport-length/auto'', and
-behave as it would have without support for viewport descriptors.
-
-For browsers which support changing orientation, and the portrait mode
-breaks this the above, it is recommended to set a minimum layout
-width, equal to that of the width in landscape mode.
+If a user agent has an initial viewport size large enough to fit common documents without breaking the layout,
+or which can easily to resized to do so,
+the recommendation is to have <em>no</em> UA styles.
+That means that it will have all descriptors initially set to ''viewport-length/auto'',
+and behave as it would have without support for viewport descriptors.
+
+If a user agent supports changing orientation,
+and the landscape mode's size fits common documents as described above
+but the portrait mode's size does not,
+it is recommended to set a minimum layout width
+equal to that of the width in landscape mode.
 
 <div class="example">
     <pre>
@@ -1442,7 +1444,7 @@ part of a recommended UA stylesheet.
 
 This appendix is <em>informative</em>.
 
-This appendix describes changes from the 
+This appendix describes changes from the
 <a href="http://www.w3.org/TR/2011/WD-css-device-adapt-20110915/"
    >15 September 2011 First Public Working Draft</a>.