rust/hg-core/Cargo.toml

cext: correct the argument handling of `b85encode()`

The type stub indicated that this argument is `Optional`, which implies None is
allowed.  I don't see in the documentation where that's the case for `i`[1], and
trying it in `hg debugshell` resulted in the method failing with a TypeError.  I
guess it was typed as an `int` argument because the `p` format unit wasn't added
until Python 3.3[2].

In any event, 2 clients in core (`pvec` and `obsolete`) call this with no
argument supplied, and `mdiff` calls it with True.  So I guess we've avoided the
None arg case, and when no arg is supplied, it defaults to the 0 initialization
of the `pad` variable in C.  Since the `p` format unit accepts both `int` and
None, as well as `bool`, I'm not bothering to bump the module version- this code
is more permissive than it was, in addition to being more correct.

Interestingly, when I first imported the `cext` and `pure` methods in the same
manner as the previous commit, it dropped the `Optional` part of the argument
type when generating `util.pyi`.  No idea why.

[1] https://docs.python.org/3/c-api/arg.html#numbers
[2] https://docs.python.org/3/c-api/arg.html#other-objects

[package]
name = "hg-core"
version = "0.1.0"
authors = ["Georges Racinet <[e-mail]>"]
description = "Mercurial pure Rust core library, with no assumption on Python bindings (FFI)"
edition = "2021"

[lib]
name = "hg"

[dependencies]
bitflags = "1.3.2"
bytes-cast = "0.3.0"
byteorder = "1.4.3"
derive_more = "0.99.17"
hashbrown = { version = "0.13.1", features = ["rayon"] }
home = "0.5.4"
im-rc = "15.1.0"
itertools = "0.10.5"
lazy_static = "1.4.0"
libc = "0.2.137"
logging_timer = "1.1.0"
rand = "0.8.5"
rand_pcg = "0.3.1"
rand_distr = "0.4.3"
rayon = "1.7.0"
regex = "1.7.0"
self_cell = "1.0"
serde = { version = "1.0", features = ["derive"] }
sha-1 = "0.10.0"
twox-hash = "1.6.3"
same-file = "1.0.6"
tempfile = "3.3.0"
toml = "0.6"
thread_local = "1.1.4"
crossbeam-channel = "0.5.6"
log = "0.4.17"
memmap2 = { version = "0.5.8", features = ["stable_deref_trait"] }
zstd = "0.12"
format-bytes = "0.3.0"
once_cell = "1.16.0"
bitvec = "1.0.1"
chrono = "0.4.34"

# We don't use the `miniz-oxide` backend to not change rhg benchmarks and until
# we have a clearer view of which backend is the fastest.
[dependencies.flate2]
version = "1.0.24"
features = ["zlib"]
default-features = false

[dev-dependencies]
clap = { version = "~4.0", features = ["derive"] }
pretty_assertions = "1.1.0"