bug: deno fmt not recognizing --ext

Neovim version (nvim -v)

NVIM v0.10.0

Operating system/version

MacOS 14.6.1

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Log file

2024-10-21 17:05:06[INFO] deno_fmt exited with code 1 2024-10-21 17:05:06[DEBUG] deno_fmt stdout: { "" } 2024-10-21 17:05:06[DEBUG] deno_fmt stderr: { "\27[0m\27[1m\27[31merror\27[0m: a value is required for '--ext ' but none was supplied", " [possible values: ts, tsx, js, jsx, md, json, jsonc, css, scss, sass, less, html, svelte, vue, astro, yml, yaml, ipynb]", "", "" } 2024-10-21 17:05:06[ERROR] Formatter 'deno_fmt' error: [0m[1m[31merror[0m: a value is required for '--ext ' but none was supplied [possible values: ts, tsx, js, jsx, md, json, jsonc, css, scss, sass, less, html, svelte, vue, astro, yml, yaml, ipynb]

Formatters for this buffer: LSP: svelte deno_fmt ready (svelte, javascriptreact, markdown, jsonc, javascript, typescriptreact, json, html, css, typescript) /Users/jakubdonovan/.local/share/nvim/mason/bin/deno

Describe the bug

Unable to format svelte files with deno_fmt. Here's the relevant extract of my conform setup. All other files format as they should, but svelte files fail to format.

 formatters_by_ft = {
    svelte = {
      "deno_fmt",
      args = { "--ext", "svelte", "--stdin-filepath", "$FILENAME", "--unstable-component" },
    }
  },

  format_on_save = {
    enabled = true,
    timeout_ms = 2000,
    lsp_fallback = true,
  }

As you can see,deno supports formatting of svelte files.

Screenshot 2024-10-21 at 17 09 59

What is the severity of this bug?

minor (annoyance)

Steps To Reproduce

open svelte file and try to format it

Expected Behavior

it should format

Minimal example file

No response

Minimal init.lua

No response

Additional context

No response

stevearc / conform.nvim