So the pickle issues were because the .gitattributes file changed multiple times since the last release but the files were not modified, so git did not fix them in my build repo. This should cover random and 2to3.

Most of the stdlib is correct CRLF.

XML should be immune to LF/CRLF differences, so we should harden the test (or the library?) against those.

IMO, we should also harden the multibyte tests against newline differences. When they read the test data with 'rb' they can also .replace(b'\r\n', b'\n') - it's totally external to the tests.

test_pcbuild_rt should fail in an install (or better yet, be skipped - we don't ship rt.bat).