Bug HTML stats

Categories containing a space were not displayed properly
https://github.com/marienfressinaud/FreshRSS/issues/547

app/views/stats/repartition.phtml

@@ -10,12 +10,12 @@
 	<?php foreach ($this->categories as $category) {
 		$feeds = $category->feeds();
 		if (!empty($feeds)) {
-			echo '<optgroup label=', $category->name(), '>';
+			echo '<optgroup label="', $category->name(), '">';
 			foreach ($feeds as $feed) {
 				if ($this->feed && $feed->id() == $this->feed->id()){
-					echo '<option value ="', $feed->id(), '" selected data-url="', _url('stats', 'repartition', 'id', $feed->id()), '">', $feed->name(), '</option>';
+					echo '<option value="', $feed->id(), '" selected="selected" data-url="', _url('stats', 'repartition', 'id', $feed->id()), '">', $feed->name(), '</option>';
 				} else {
-					echo '<option value ="', $feed->id(), '" data-url="', _url('stats', 'repartition', 'id', $feed->id()), '">', $feed->name(), '</option>';
+					echo '<option value="', $feed->id(), '" data-url="', _url('stats', 'repartition', 'id', $feed->id()), '">', $feed->name(), '</option>';
 				}
 			}
 			echo '</optgroup>';