diff rustfmt.toml @ 45623:426294d06ddc

rust: move rustfmt.toml to repo root so it can be used by `hg fix`

`hg fix` runs the formatters from the repo root so it doesn't pick up
the `rustfmt.toml` configs we had in each the `hg-core`, `hg-cpython`,
and `rhg` packages, which resulted in warnings about `async fn` not
existing in Rust 2015. This patch moves the `rustfmt.toml` file to the
root so `hg fix` will use it.

By putting the `rustfmt.toml` file in a higher-level directory, it
also applies to the `chg` and `hgcli` packages. That makes
`test-check-rust-format.t` fail, so this patch also applies the new
formatting rules to those packages.

Differential Revision: https://phab.mercurial-scm.org/D9142

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rustfmt.toml	Thu Oct 01 09:09:35 2020 -0700
@@ -0,0 +1,4 @@
+edition = "2018"
+max_width = 79
+wrap_comments = true
+error_on_line_overflow = true