Print leading comment for readonly modifier of TS Mapped Types

[sosukesuzuki]

Description

Fixes #11098

Since TSMappedType contains { and }, it could not be implemented as a simple leading comments.

Checklist

• I’ve added tests to confirm my change works.
• (If the change is user-facing) I’ve added my changes to changelog_unreleased/*/XXXX.md file following changelog_unreleased/TEMPLATE.md.
• I’ve read the contributing guidelines.

✨Try the playground for this PR✨

[fisker]

I'm not sure if we want to do this, the current output seems more preferred for me.

Prettier pr-11190
Playground link

--parser babel

Input:

class A {
  static // comment
  foo() {}
  
  get // comment
  foo() {}
  
   // comment
  static
  foo() {}
  
  // comment
  get 
  foo() {}
  
}

Output:

class A {
  static // comment
  foo() {}

  get // comment
  foo() {}

  // comment
  static foo() {}

  // comment
  get foo() {}
}

[thorn0]

superseded by #13427