Merge pull request NixOS#13060 from VitGottwald/patch-3

Fix perl example

Author: Ericson2314

doc/manual/source/command-ref/nix-shell.md

@@ -242,16 +242,21 @@ print(t)
 ```
 
 Similarly, the following is a Perl script that specifies that it
-requires Perl and the `HTML::TokeParser::Simple` and `LWP` packages:
+requires Perl and the `HTML::TokeParser::Simple`, `LWP` and
+`LWP::Protocol::Https` packages:
 
 ```perl
 #! /usr/bin/env nix-shell
-#! nix-shell -i perl --packages perl perlPackages.HTMLTokeParserSimple perlPackages.LWP
+#! nix-shell -i perl 
+#! nix-shell --packages perl 
+#! nix-shell --packages perlPackages.HTMLTokeParserSimple 
+#! nix-shell --packages perlPackages.LWP
+#! nix-shell --packages perlPackages.LWPProtocolHttps
 
 use HTML::TokeParser::Simple;
 
 # Fetch nixos.org and print all hrefs.
-my $p = HTML::TokeParser::Simple->new(url => 'http://nixos.org/');
+my $p = HTML::TokeParser::Simple->new(url => 'https://nixos.org/');
 
 while (my $token = $p->get_tag("a")) {
     my $href = $token->get_attr("href");