Add SPDX-License-Identifier headers

Add SPDX-License-Identifier headers to all substantial source files.
Collapse copyright years.  Add some Emacs configuration for files
where the copyright notice is at the end.  Add a test that every
file has SPDX-License-Identifier.

1 files changed, 1 insertions, 1 deletions

diff --git a/tests/tap/perl/Test/RRA/Automake.pm b/tests/tap/perl/Test/RRA/Automake.pm
index 3ba5bcb..6c6e947 100644
--- a/tests/tap/perl/Test/RRA/Automake.pm
+++ b/tests/tap/perl/Test/RRA/Automake.pm
@@ -104,7 +104,7 @@ sub all_files {
         my $file = $_;
         my $path = $File::Find::name;
         $path =~ s{ \A [.]/ }{}xms;
-        if ($skip{$path} or $files_skip{$file} or $file =~ m{ [.] lo \z }xms) {
+        if ($skip{$path} || $files_skip{$file} || $file =~ m{ [.] lo \z }xms) {
             $File::Find::prune = 1;
             return;
         }