rust/hg-cpython/Cargo.toml

discovery: fix docstring of `outgoing` class

Also, introduce a more correct name `ancestorsof` for what was named
`missingheads` before. For now, we just forward `ancestorsof` to `missingheads`
until all users are changed.

There were some mistakes in the old docstring / name:

* `missingheads` (new name: `ancestorsof`) contains the revs whose ancestors
  are included in the outgoing operation. It may contain non-head revs and revs
  which are already on the remote, so the name "missingheads" is wrong in two
  ways.
* `missing` contains only ancestors of `missingheads`, so not *all nodes*
  present in local but not in remote.
* `common` might not contain all common revs, e.g. not some that are not an
  ancestor of `missingheads`.

It seems like the misleading name have fostered an actual bug (issue6372),
where `outgoing.missingheads` was used assuming that it contains the heads of
the missing changesets.

[package]
name = "hg-cpython"
version = "0.1.0"
authors = ["Georges Racinet <[e-mail]>"]
edition = "2018"

[lib]
name='rusthg'
crate-type = ["cdylib"]

[features]
default = ["python27"]

# Features to build an extension module:
python27 = ["cpython/python27-sys", "cpython/extension-module-2-7"]
python3 = ["cpython/python3-sys", "cpython/extension-module"]

# Enable one of these features to build a test executable linked to libpython:
# e.g. cargo test --no-default-features --features python27-bin
python27-bin = ["cpython/python27-sys"]
python3-bin = ["cpython/python3-sys"]

[dependencies]
hg-core = { path = "../hg-core"}
libc = '*'
log = "0.4.8"
simple_logger = "1.6.0"

[dependencies.cpython]
version = "0.4.1"
default-features = false