In quoting.rakudoc, add note how newline after Heredocs can be removed via chomp (#4656)

Author: schultzdavid

doc/Language/quoting.rakudoc

@@ -562,6 +562,14 @@ some multi line
 =end code
 
 I<Heredocs> include the newline from before the terminator.
+A common idiom to remove it is to put a L<C<chomp>|/type/Str#routine_chomp> at the beginning, for example:
+
+=begin code
+my $s = chomp q:to/END/;
+The result will have
+no final newline.
+END
+=end code
 
 To allow interpolation of variables use the C<qq> form, but you will then have
 to escape metacharacters C<\{> as well as C<$> if it is not the sigil for a