Perl 6's printf function doesn't yet work with a file

doc/Language/5to6-perlfunc.pod6

@@ -978,22 +978,23 @@ L<Continue|/language/regexes#Continue>.
 
 =item print
 
-C<print> can be used as a function in Perl 6, defaulting to standard
+C<print> can be used as a function in Perl 6, writing to standard
 out. To use C<print> as a function with a filehandle I<instead> of
-standard out, you need to put a colon after the filehandle. I. e.
-C<print $fh: "Howdy!">. The use of the colon as an "invocant marker"
-here is discussed at L<https://design.perl6.org/S03.html#line_4019>.
-Alternately, you can use a method call: C<$fh.print("howdy!")>
+standard out, you can use a method call: C<$fh.print("howdy!")>
 
 =head2 printf
 
-=item printf FILEHANDLE
-
 =item printf FORMAT, LIST
 
 =item printf
 
-Works in Perl 6. For the formats, see the documentation for C<sprintf>.
+Works in Perl 6, but only as a function writing to standard out.  To
+use for a file handle, one must create a formatted string using function C<sprintf>
+and then pass the string to C<IO::Handle> method C<.say> or C<.print> as desired.
+For the formats, see the documentation for C<sprintf>.  For example:
+
+  my $fh = open "tmp.txt", :w;
+  $fh.say(sprintf("%d", 2));
 
 =head2 prototype