Add mode parameter to mkdir()/.mkdir

Author: lizmat

S32-setting-library/IO.pod

@@ -237,7 +237,7 @@ C<False>.
 =head2 mkdir()
 X<mkdir()>
 
-    sub mkdir($dir as IO --> Bool) is export
+    sub mkdir($dir as IO, $mode = 0o777 --> Bool) is export
 
 Creates the directory as indicated by the positional parameter.  Returns
 C<True> on success or an appropriate C<Failure>.
@@ -898,7 +898,7 @@ rather than the lines themselves.  By default, lines will be returned.
 =head3 .mkdir
 X<.mkdir>
 
-    method mkdir(--> Bool)
+    method mkdir($mode = 0o777 --> Bool)
 
 Like L</mkdir()>, but with L</.absolute> as the first parameter.