Function tie_mail 

pub(crate) fn tie_mail(
    config: &Config,
    files: &[PathBuf],
    ties: &mut LocalLinks,
)

GitHub’s notification mail, tied to its issue’s task, and to that task’s project. Mail about an issue that is not yours makes nothing; nor does a message that only claims to come from GitHub: its signature must say so, as the Porch judges it, or anyone could slip a message into a project.