weaken Perl 6 is better claim and warn about use of say

doc/Language/101-basics.pod6

@@ -6,7 +6,8 @@
 
 Perl originated as a programming language intended to gather and summarize
 information from text files.  It's still strong in text processing, but Perl 5
-is also a powerful general-purpose programming language.  Perl 6 is even better.
+is also a powerful general-purpose programming language.  We think Perl 6 can
+be even better.
 
 Suppose that you host a table tennis tournament.  The referees tell you the
 results of each game in the format C<Player1 Player2 | 3:2>, which means
@@ -352,7 +353,7 @@ on the result of the second sort, and stores the final list in C<@sorted>.
 
 =end code
 
-=head3 X<C<say>> and X<C<print>>
+=head3 X<C<say>>, X<C<print>> and X<C<put>>
 
 To print out the players and their scores, the code loops over C<@sorted>,
 setting C<$n> to the name of each player in turn.  Read this code as "For each
@@ -361,6 +362,9 @@ following block."  C<say> prints its arguments to the standard output (the
 screen, normally), followed by a newline.  (Use C<print> if you don't want the
 newline at the end.)
 
+Note that C<say> will truncate certain data structures by calling the C<.gist>
+method so C<put> is safer if you want exact output.
+
 =head3 X<C<interpolation>>
 
 When you run the program, you'll see that C<say> doesn't print the contents of