CI tests fail for test_send_error_to_admins

[larseggert]

What happened?

https://github.com/ietf-tools/datatracker/runs/6271450651?check_suite_focus=true#step:6:21

What browser(s) are you seeing the problem on?

No response

Code of Conduct

• I agree to follow the IETF's Code of Conduct

[jennifer-richards]

The error occurs because a file name that must appear in an email is split across lines. This happens when the pathname the wrong long length. It's not new to the code - I've seen it on my dev machine under some circumstances. Something about the CI test environment has changed and begun triggering it, though.