HEEX formatter (Phoenix.LiveView.HTMLFormatter / mix format) seems to introduce an unexpected line break in the generated html. User error? A bug? ; )

This looks super-related to Formatter adds space/newline to inline elements · Issue #2237 · phoenixframework/phoenix_live_view · GitHub, but, AFAICT, the fix got merged in LiveView 0.18.2, and I am seeing the problem in 0.18.3.

Details:

Here is my repro (happy to provide a more streamline repro gist, if useful):

I want to add a comma after some text

        <%= link to: ... do %>
          <%= @item.content %><% end %>,

and this works great. Here is the web page (loaded in Safari, on a Mac):

Running mix format, moves the <% end %> element (and, therefore, the comma that follows) to its own line:

        <%= link to: ... do %>
          <%= @item.content %>
        <% end %>,

which introduces a space before the comma:

I am not expecting a code formatter to change what the code does, only what the code looks like. Am I doing something obviously silly here, or does this look like a bug? ; )

Thank you!

PS A bit more data:

$ cat .formatter.exs
[
  line_length: 120,
  import_deps: [:ecto, :phoenix],
  plugins: [Phoenix.LiveView.HTMLFormatter],
  inputs: ["*.{heex,ex,exs}", "priv/*/seeds.exs", "{config,lib,test}/**/*.{heex,ex,exs}"],
  subdirectories: ["priv/*/migrations"]
]

$ cat mix.exs | grep phoenix
      {:phoenix, "~> 1.6"},
      {:phoenix_ecto, "~> 4.4"},
      {:phoenix_html, "~> 3.2"},
      {:phoenix_live_dashboard, "~> 0.7"},
      {:phoenix_live_reload, "~> 1.4", only: :dev},
      {:phoenix_live_view, "~> 0.18.3"},

$ elixir --version
Erlang/OTP 25 [erts-13.1.1] [source] [64-bit] [smp:10:10] [ds:10:10:10] [async-threads:1] [jit] [dtrace]

Elixir 1.14.1 (compiled with Erlang/OTP 25)