[css-text] Fix markup to not do a weird linebreak, which happens to active a markdown blockquote now.

Author: tabatkins

css-text/Overview.bs

@@ -510,8 +510,8 @@ Languages and Typesetting</h4>
 
   <p>The source text of a document often contains formatting
     that is not relevant to the final rendering: for example,
-    <a href="http://rhodesmill.org/brandon/2012/one-sentence-per-line/"
-    >breaking the source into segments</a> (lines) for ease of editing
+    <a href="http://rhodesmill.org/brandon/2012/one-sentence-per-line/">breaking the source into segments</a>
+    (lines) for ease of editing
     or adding white space characters such as tabs and spaces to indent the source code.
     CSS white space processing allows the author to control interpretation of such formatting:
     to preserve or collapse it away when rendering the document.