Merge branch 'jn/userdiff-perl-updates'

* jn/userdiff-perl-updates: userdiff/perl: tighten BEGIN/END block pattern to reject here-doc delimiters tests: make test_expect_code quieter on success userdiff/perl: catch sub with brace on second line userdiff/perl: match full line of POD headers userdiff/perl: anchor "sub" and "package" patterns on the left t4018 (funcname patterns): minor cleanups t4018 (funcname patterns): make configuration easier to track t4018 (funcname patterns): make .gitattributes state easier to track