Add rustfmt.toml with formatting disabled

Currently, Cargo does not use rustfmt for its source code. By adding a
rustfmt.toml that simply disables all formatting rules, editors which
use rustfmt by default for all Rust code will do the right thing and
leave the source code unchanged.

diff --git a/rustfmt.toml b/rustfmt.toml
new file mode 100644 (file)
index 0000000..c7ad93b
--- /dev/null
+++ b/rustfmt.toml
@@ -0,0 +1 @@
+disable_all_formatting = true