Format-on-save no longer functioning for rustfmt. No configuration change was made

## Information

**VIM version**

VIM - Vi IMproved 9.0 (2022 Jun 28, compiled May 10 2022 08:40:37)
Included patches: 1-749

Operating System:

```
% lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.5 LTS
Release: 22.04
Codename: jammy
```

**NOTE:** LSP support is disabled because I'm also running coc.nvim for languages where a suitably performant, suitably licensed LSP is available... which does include Rust, though adding that predates format-on-save breaking by a long time and I have `coc.nvim`'s format-on-save support disabled because it's much more laissez-faire than `cargo fmt` and I can't find docs for changing that.

## What went wrong

Somewhere along the way, `rustfmt`-on-save stopped working and `:ALEFix` also has no effect.

I'm guessing it happened as a result of a `:PlugUpdate` bumping ALE somewhere along the way (I use [vim-plug](https://github.com/junegunn/vim-plug)) though I suppose it could also have come as a result of a `rustup update`.

Running `cargo fmt` manually still has the expected effect, meaning that my test input *is* testing what I want it to test, given the context of my `rustfmt.toml`.

I couldn't find any issues that appeared to be describing the same problem and the `ALEInfo` command history says that `rustfmt` is getting run and returning an exit code of 1, which, [if this list is still valid](https://github.com/rust-lang/rustfmt/issues/1977), basically means "anything but the code being too malformed to format".

## Reproducing the bug

1. Open a Rust source file
2. `>>` (indent) a statement that's currently properly indented. (eg. `println!(...);`)
3. `:ALEFix`
4. Nothing happens
5. `:w`
6. Nothing happens
7. `!cargo fmt`
8. Line gets popped back to the correct indent level

### :ALEInfo

Expand

```
Current Filetype: rust
Available Linters: ['analyzer', 'cargo', 'cspell', 'rls', 'rustc']
Linter Aliases:
'analyzer' -> ['rust_analyzer']
Enabled Linters: ['analyzer']
Ignored Linters: ['analyzer']
Suggested Fixers:
'remove_trailing_lines' - Remove all blank lines at the end of a file.
'rustfmt' - Fix Rust files with Rustfmt.
'trim_whitespace' - Remove all trailing whitespace characters at the end of every line.

Linter Variables:
let g:ale_rust_analyzer_config = {'diagnostics': {'disabled': ['inactive-code', 'macro-error', 'unresolved-import', 'unresolved-proc-macro']}, 'procMacro': {'enable': v:true}}
let g:ale_rust_analyzer_executable = 'rust-analyzer'
let g:ale_rust_rustfmt_executable = 'rustfmt'
let g:ale_rust_rustfmt_options = ''

Global Variables:
let g:ale_cache_executable_check_failures = v:null
let g:ale_change_sign_column_color = v:null
let g:ale_command_wrapper = ''
let g:ale_completion_delay = v:null
let g:ale_completion_enabled = 0
let g:ale_completion_max_suggestions = v:null
let g:ale_disable_lsp = 1
let g:ale_echo_cursor = 1
let g:ale_echo_msg_error_str = 'Error'
let g:ale_echo_msg_format = v:null
let g:ale_echo_msg_info_str = 'Info'
let g:ale_echo_msg_warning_str = 'Warning'
let g:ale_enabled = 1
let g:ale_fix_on_save = 1
let g:ale_fixers = {'xml': ['xmllint'], '*': ['remove_trailing_lines', 'trim_whitespace'], 'javascript': ['eslint'], 'css': ['stylelint'], 'make': ['remove_trailing_lines']}
let b:ale_fixers = ['rustfmt', 'trim_whitespace', 'remove_trailing_lines']
let g:ale_history_enabled = 1
let g:ale_info_default_mode = 'preview'
let g:ale_history_log_output = 1
let g:ale_keep_list_window_open = v:null
let g:ale_lint_delay = 200
let g:ale_lint_on_enter = 1
let g:ale_lint_on_filetype_changed = 1
let g:ale_lint_on_insert_leave = 0
let g:ale_lint_on_save = 1
let b:ale_lint_on_save = 0
let g:ale_lint_on_text_changed = 'never'
let g:ale_linter_aliases = {}
let g:ale_linters = {}
let b:ale_linters = ['analyzer']
let g:ale_linters_explicit = 0
let g:ale_linters_ignore = {}
let g:ale_list_vertical = v:null
let g:ale_list_window_size = v:null
let g:ale_loclist_msg_format = v:null
let g:ale_max_buffer_history_size = 20
let g:ale_max_signs = v:null
let g:ale_maximum_file_size = v:null
let g:ale_open_list = 1
let g:ale_pattern_options = v:null
let g:ale_pattern_options_enabled = v:null
let g:ale_root = {}
let g:ale_set_balloons = 1
let g:ale_set_highlights = 1
let g:ale_set_loclist = 0
let g:ale_set_quickfix = 1
let g:ale_set_signs = 1
let g:ale_sign_column_always = 1
let g:ale_sign_error = '✗'
let g:ale_sign_info = v:null
let g:ale_sign_offset = v:null
let g:ale_sign_style_error = v:null
let g:ale_sign_style_warning = v:null
let g:ale_sign_warning = '‼'
let g:ale_sign_highlight_linenrs = v:null
let g:ale_type_map = v:null
let g:ale_use_neovim_diagnostics_api = 0
let g:ale_use_global_executables = v:null
let g:ale_virtualtext_cursor = 'all'
let g:ale_warn_about_trailing_blank_lines = 1
let g:ale_warn_about_trailing_whitespace = 1

Command History:

(finished - exit code 1) ['/usr/bin/zsh', '-c', '''rustfmt'' < ''/tmp/vpQIziD/3/main.rs''']
(finished - exit code 1) ['/usr/bin/zsh', '-c', '''rustfmt'' < ''/tmp/vpQIziD/8/main.rs''']
```