Merge branch 'jk/test-body-in-here-doc'

The test framework learned to take the test body not as a single string but as a here-document. * jk/test-body-in-here-doc: t/.gitattributes: ignore whitespace in chainlint expect files t: convert some here-doc test bodies test-lib: allow test snippets as here-docs chainlint.pl: add tests for test body in heredoc chainlint.pl: recognize test bodies defined via heredoc chainlint.pl: check line numbers in expected output chainlint.pl: force CRLF conversion when opening input files chainlint.pl: do not spawn more threads than we have scripts chainlint.pl: only start threads if jobs > 1 chainlint.pl: add test_expect_success call to test snippets