Typo, removed double clear word

doc/manual.html

@@ -161,7 +161,7 @@
       Default is true.</dd>
 
       <dt id="option_autoClearEmptyLines"><code>autoClearEmptyLines (boolean)</code></dt>
-      <dd>When turned on (default is off), this will clear
+      <dd>When turned on (default is off), this will
       automatically clear lines consisting only of whitespace when the
       cursor leaves them. This is mostly useful to prevent auto
       indentation from introducing trailing whitespace in a file.</dd>