missing space for pattern matching of constructor holding record

[jonsterling]

Describe the bug Constructors with a single record arguments are formatted without a space. This seems to be related to https://github.com/tweag/topiary/issues/647.

To Reproduce Try to format the following code:

match foo with
| Object { self; methods } ->
  hello

Topiary returns:

match foo with
| Object{ self; methods } ->
  hello

Expected behavior

The example code should remain unchanged. A constructor should always have a space between it and its arguments.

Environment

• OS name + version: macOS 14
• Version of the code: topiary playground in browser; also tried locally with topiary 0.4.0 using ocaml.scm from this repository.

[jonsterling]

I think I see how to fix this, will send a patch.