rust-annotate: do not impl Sync for Lines I failed to notice before that bdiff_diff mutates its inputs by storing bookkeeping information in the `n` and `e` fields. This means &Lines can't be shared across threads, so Lines cannot be Sync. Fortunately nothing was using this. The parallel file reading and line splitting only relies on Send. The reason I didn't notice this to begin with was that Lines contains a *mut ffi::bdiffline, which is accessible from &Lines, so I never wrote or thought about &mut Lines. This pattern (using a mutable pointer stored in an immutable struct) would be expressed with RefCell if this was pure safe Rust.

#!/usr/bin/env python3
#
# An example hgweb CGI script, edit as necessary
# See also https://mercurial-scm.org/wiki/PublishingRepositories

# Path to repo or hgweb config to serve (see 'hg help hgweb')
config = b"/path/to/repo/or/config"

# Uncomment and adjust if Mercurial is not installed system-wide
# (consult "installed modules" path from 'hg debuginstall'):
# import sys; sys.path.insert(0, "/path/to/python/lib")

from mercurial import demandimport

demandimport.enable()
from mercurial.hgweb import hgweb, wsgicgi

application = hgweb(config)
wsgicgi.launch(application)