[Perl/perl5] c80a22: t/comp: use \Q\E to avoid manual escaping

[Nicolas R.]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: c80a2203a88d2e9a2f5f907ab608cda4c65d4436
      
https://github.com/Perl/perl5/commit/c80a2203a88d2e9a2f5f907ab608cda4c65d4436
  Author: Nicolas R <atoo...@cpan.org>
  Date:   2020-08-12 (Wed, 12 Aug 2020)

  Changed paths:
    M t/comp/require.t
    M t/comp/use.t

  Log Message:
  -----------
  t/comp: use \Q\E to avoid manual escaping

This is avoiding some manual escaping,
fixes some test where '.' was not escaped
and also improve readability of the unit test itself.