Oops, forgot one Testable -> FileTestable

Author: lizmat

S16-io.pod

@@ -250,7 +250,7 @@ references to S32-setting-library/IO.pod.  An overview:
   islink($target);              # is the file a symbolic link?
   readlink($target);            # the destination of the symlink ($source)
 
-=head3 IO::Testable Role
+=head3 IO::FileTestable Role
 
 Role to be consumed by both C<IO::Path> as well as C<IO::Handle>.