This commit adds 'zerver/lib/email_notifications.py'
to the FILES_WITH_LEGACY_SUBJECT set.
Because the file can have 'subject' in the email sense,
it should be exempted from the 'avoid subject as a var' lint rule.
This directory contains scripts that are used in building, managing,
testing, and other forms of work in a Zulip development environment.
Note that tools that are also useful in production belong in
scripts/ or should be Django management commands.
ab8222c4ae