pod-spelling.t: Do not assume LINTIAN_ROOT is defined

Signed-off-by: Niels Thykier <niels@thykier.net>
Tuorial/WritingChecks.pod: Escape slashes in L<...>

Signed-off-by: Niels Thykier <niels@thykier.net>
t: Make DepMap tests resistent to hash order changes

Sort the return value of selectable, so the test is immune to
iteration order of hashes.

Signed-off-by: Niels Thykier <niels@thykier.net>
c/source-copyright.pm: Avoid "my ($_)", which is experimental

Signed-off-by: Niels Thykier <niels@thykier.net>
c/cruft.pm: Replace given/when with if/else

Signed-off-by: Niels Thykier <niels@thykier.net>
t/runtests: Avoid of undef when there are no matches

Signed-off-by: Niels Thykier <niels@thykier.net>
t: Make test resistent to pod2man changes

Signed-off-by: Niels Thykier <niels@thykier.net>
d/changelog: Add entries for the perl5.18 porting

Signed-off-by: Niels Thykier <niels@thykier.net>