Jan Malakhovski writes:
>
> internally. The latter produces a sexp with
>
> ```
> :headers (:Subject "" :From "" :To "" :Reply-To "" :Date "")
> ```
>
> even when the message has many more headers.
Yes, you are correct that currently format_headers_sprinter in
notmuch-show.c only
# What I did
I added "X-Github-Sender" to `notmuch-message-headers`.
Looked at a message sent via github with `notmuch-show`.
# What I expected
To see "X-Github-Sender" header displayed in `notmuch-show`.
# What I got
No such header was displayed.
# Why
`(notmuch-show "query")` runs
```