Fix typo in documentation

gui/list.html

@@ -1837,8 +1837,8 @@
 		settings for left and right.  The same 15 settings are available.
 	</p>
 	<p class=func><span class=keyword>lineOutLevel</span>(both);</p>
-	<p class=desc style="padding-bottom:0.2em;">Adjust the line level outout voltage range.  The following
-		settings are possible:
+	<p class=desc style="padding-bottom:0.2em;">Adjust the line level output
+		voltage range.  The following settings are possible:
 	</p>
 <pre class="desc">
 13: 3.16 Volts p-p