[io grant] Polish IO::Handle.say

- We have .put docs; mention them instead of .print
- Don't say we'll call .print-nl method; that's an implementation detail

doc/Type/IO/Handle.pod6

@@ -377,10 +377,9 @@ Defined as:
 
     multi method say(IO::Handle:D: **@text --> True)
 
-This method is identical to L<print|/type/IO::Handle#method_print> except
-that it stringifies its arguments by calling C<.gist> on them and
-auto-appends a newline, with a call to L<print-nl|/type/IO::Handle#method_print-nl>,
-after the final argument.
+This method is identical to L<put|/type/IO::Handle#method_put> except
+that it stringifies its arguments by calling L«C<.gist>|/routine/gist» instead
+of L«C<.Str>|/routine/Str».
 
 Attempting to call this method when the handle is
 L<in binary mode|/type/IO::Handle#method_encoding> will result in