[io grant] Document IO::Handle.Str

Author: zoffixznet

doc/Type/IO/Handle.pod6

@@ -282,6 +282,11 @@ and C<$*ERR> it returns an L<IO::Special|/type/IO::Special> object.
 
 Alias for L«C<.path>|/type/IO::Handle#method_path»
 
+=head2 method Str
+
+Returns the value of L«C<.path>|/type/IO::Handle#method_path», coerced
+to L<Str>.
+
 =for code :skip-test
     say "foo".IO.open.path; # OUTPUT: «"foo".IO␤»