Diagnostic concerning custom 'label' on multiple bindings being misdiagnosed

[gohanlon]

Description

This test is representative of the misdiagnosis:

  func testCustomInitEscapingWithMultipleBindings() {
    assertMacro {
      """
      @MemberwiseInit
      struct S {
        @Init(escaping: true)
        let v, r: T
      }
      """
    } diagnostics: {
      """
      @MemberwiseInit
      struct S {
        @Init(escaping: true)
        ┬────────────────────
        ╰─ 🛑 Custom 'label' can't be applied to multiple bindings
        let v, r: T
      }
      """
    }
  }

Other applications of @Init to multiple bindings are also affected.

Checklist

• [X] If possible, I've reproduced the issue using the main branch of this package.
• [X] This issue hasn't been addressed in an existing GitHub issue or discussion.

Expected behavior

Macro should expand without any diagnostics.

swift-memberwise-init-macro version information

0.2.0