Fix default value for const option

Author: eliemichel

index.html

@@ -92,7 +92,7 @@ <h2 class="content-subhead">Generator</h2>
 					</label>
 
 					<label class="pure-checkbox" for="use_const">
-						<input type="checkbox" id="use_const" name="use_const" />
+						<input type="checkbox" id="use_const" name="use_const" checked />
 						use_const
 					</label>
 				</fieldset>