Typo fix in guidelines

next/guidelines.html

@@ -1519,7 +1519,7 @@ is a <strong>hint</strong>. :-)
 </p>
 <p class="leftbar">
 We <strong>RECOMMEND</strong> you put a reasonable amount effort into the content of the
-<code>remarks.md</code> file: it is a required for for a reason. :-)
+<code>remarks.md</code> file: it is a required for a reason. :-)
 </p>
 <div id="rules_abuse">
 <div id="abusing_rules">

next/guidelines.md

@@ -1398,7 +1398,7 @@ is a **hint**.  :-)
 
 <p class="leftbar">
 We **RECOMMEND** you put a reasonable amount effort into the content of the
-`remarks.md` file: it is a required for for a reason.  :-)
+`remarks.md` file: it is a required for a reason.  :-)
 </p>