fix typos

irrelevance_common.pl

@@ -25,7 +25,7 @@
  *   - media_type": "img": the media type of the file
  *
  * 
- * For a _directory_ the following information is avalable:
+ * For a _directory_ the following information is available:
  *   - abs_path (atom): the absolute path of the file
  *   - creation_time (integer): the time the file was created as seconds since
  *     epoch (1970-07-07)
@@ -59,7 +59,7 @@ directory(Item) :- theory_bg:item(Item, Dict), is_dict(Dict,directory).
 %! in_directory(+Item,?Directory) is semidet.
 %
 %  Extracts the base directory of an item. Only holds if the base directory is
-%  Also in the background knowledge.
+%  also in the background knowledge.
 in_directory(Item, Directory) :- 
     abs_path(Item, ItemPath),
     ItemPath \= '/',  % Per POSIX definition '/' is in path '/'.