[mediaqueries] Editorial: use less informal phrasing.

Author: frivoal

mediaqueries/Overview.html

@@ -1115,7 +1115,7 @@ <h3 class="heading settled heading" data-level=3.1 id=error-handling><span class
 <p>	A media query that does not match the grammar in the previous section must be replaced by <span class=css data-link-type=maybe title="not all">not all</span> during parsing.
 
 <p class=note>	Note: Note that a grammar mismatch does <strong>not</strong> wipe out an entire <a data-link-type=dfn href=#media-query-list title="media query list">media query list</a>,
-	just the <a data-link-type=dfn href=#media-query title="media query">media query</a> that’s messed up.
+	just the problematic <a data-link-type=dfn href=#media-query title="media query">media query</a>.
 	The parsing behavior defined above automatically recovers at the next top-level comma.
 
 	<div class=example>

mediaqueries/Overview.src.html

@@ -659,7 +659,7 @@ <h3 id=error-handling>
 	A media query that does not match the grammar in the previous section must be replaced by ''not all'' during parsing.
 
 	Note: Note that a grammar mismatch does <strong>not</strong> wipe out an entire <a>media query list</a>,
-	just the <a>media query</a> that's messed up.
+	just the problematic <a>media query</a>.
 	The parsing behavior defined above automatically recovers at the next top-level comma.
 
 	<div class='example'>