Generated by pyupgrade --py36-plus --keep-percent-format, but with the
NamedTuple changes reverted (see commit
ba7906a3c6, #15132).
Signed-off-by: Anders Kaseorg <anders@zulip.com>
Injecting the generated-file warning into the settings dict felt a
little unnecessarily magical. A warning like this is always going
to be at the top; the way it might differ between files is mainly
if the syntax for a comment varies, and in that case a simple
substitution like we're doing in this template wouldn't be enough
to express the difference anyway. So, embrace the hardcoding.
Now, the template and the images.yml entry have a very simple
relationship: the keys in one are exactly the keys in the other.
That's good for people quickly and confidently understanding it.