Small code style fixes.

src/Entity/Facet.php

@@ -111,7 +111,7 @@ class Facet extends ConfigEntityBase implements FacetInterface {
   protected $query_operator;
 
   /**
-   * A boolean flag indicating if search should exclude selected facets
+   * A boolean flag indicating if search should exclude selected facets.
    *
    * @var bool
    */

src/FacetInterface.php

@@ -208,7 +208,7 @@ interface FacetInterface extends ConfigEntityInterface {
   /**
    * Sets the exclude.
    *
-   * @param bool
+   * @param bool $exclude
    *   A boolean flag indicating if search should exclude selected facets
    */
   public function setExclude($exclude);