[IO] small language fixes

Author: moritz

lib/IO.pod

@@ -10,7 +10,7 @@
 
     sub dir Cool $path = '.', Mu :$test = none('.', '..')
 
-Returns a list if L<IO::File> and L<IO::Dir> objects for the
+Returns a list of L<IO::File> and L<IO::Dir> objects for the
 files and directories found in the $path. If $path is not given
 in lists the entries in the current directory.
 
@@ -30,7 +30,7 @@ To include all the entries (including . and ..) write:
 
     dir(test => all())
 
-To include only the files with .pl extension write
+To include only the entries with .pl extension write
 
     dir(test => /.pl$/)