Corepack strips empty lines from package.json when inserting `packageManager`

If I have a package.json with some empty lines (in this case intentionally), that doesn't specify packageManager, then running a shim (for example yarn install) adds the packageManager attribute but removes the empty lines. I would expect that any existing whitespace in the file would be preserved.

Versions

$ corepack --version
0.28.2
$ node --version
v18.20.2

Reproduction

For example, starting with:

{
  "name": "example",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "lint": "eslint .",
    "start": "react-native start",
    "test": "jest",

    "postinstall": "patch-package"
  },
  "dependencies": {
    "react": "18.2.0",
    "react-native": "0.73.8",

    "@react-native-async-storage/async-storage": "1.23.1",
    "@react-native-community/datetimepicker": "8.0.1",
    "@react-native-community/netinfo": "11.3.1",
    "@react-navigation/native": "~6.0.13",
    "@react-navigation/stack": "~6.3.2",
    "Base64": "^1.1.0",
    "deprecated-react-native-prop-types": "~4.1.0",
    "lodash": "^4.17.15",
    "moment": "^2.24.0",
    "moment-range": "^4.0.2",
    "rc-swipeout": "~2.0.11",
    "react-native-animatable": "^1.3.3",
    "react-native-blob-util": "~0.18.3",
    "react-native-camera": "~4.2.1",
    "react-native-draggable-flatlist": "~4.0.1",
    "react-native-elements": "~2.1.0",
    "react-native-fs": "~2.18.0",
    "react-native-gesture-handler": "~2.16.1",
    "react-native-image-picker": "2.3.0",
    "react-native-keyboard-aware-scroll-view": "~0.9.5",
    "react-native-linear-gradient": "^2.5.6",
    "react-native-markdown-renderer": "^3.2.8",
    "react-native-modal-selector": "~2.0.9",
    "react-native-orientation-locker": "1.4.0",
    "react-native-pdf": "~6.6.2",
    "react-native-reanimated": "~3.10.1",
    "react-native-safe-area-context": "4.10.1",
    "react-native-screens": "3.31.1",
    "react-native-signature-capture": "^0.4.10",
    "react-native-svg": "15.2.0",
    "react-native-svg-charts": "^5.3.0",
    "react-native-table-component": "~1.2.2",
    "react-native-vector-icons": "~9.2.0",
    "react-native-video": "~5.2.1",
    "react-native-webview": "13.8.6",
    "react-redux": "~7.2.9",
    "redux": "^4.0.4",
    "redux-persist": "^6.0.0",
    "redux-persist-filesystem-storage": "~4.2.0"
  },
  "devDependencies": {
    "@babel/core": "^7.20.0",
    "@babel/preset-env": "^7.20.0",
    "@babel/runtime": "^7.20.0",
    "@react-native/babel-preset": "0.73.21",
    "@react-native/eslint-config": "0.73.2",
    "@react-native/metro-config": "0.73.5",
    "@react-native/typescript-config": "0.73.1",
    "@types/react": "^18.2.6",
    "@types/react-test-renderer": "^18.0.0",
    "babel-jest": "^29.6.3",
    "eslint": "^8.19.0",
    "jest": "^29.6.3",
    "prettier": "2.8.8",
    "react-test-renderer": "18.2.0",
    "typescript": "5.0.4",

    "@babel/plugin-transform-class-properties": "~7.22.5",
    "@babel/plugin-transform-private-methods": "~7.22.5",
    "@testing-library/jest-native": "^5.4.2",
    "@testing-library/react-native": "^7.2.0",
    "babel-eslint": "^10.1.0",
    "eslint-plugin-react": "^7.20.6",
    "eslint-plugin-react-native": "~4.0.0",
    "patch-package": "~7.0.0"
  },
  "engines": {
    "node": ">=18"
  }
}

running:

yarn install

modifies this to:

{
  "name": "example",
  "version": "0.0.1",
  "private": true,
  "scripts": {
    "android": "react-native run-android",
    "ios": "react-native run-ios",
    "lint": "eslint .",
    "start": "react-native start",
    "test": "jest",
    "postinstall": "patch-package"
  },
  "dependencies": {
    "react": "18.2.0",
    "react-native": "0.73.8",
    "@react-native-async-storage/async-storage": "1.23.1",
    "@react-native-community/datetimepicker": "8.0.1",
    "@react-native-community/netinfo": "11.3.1",
    "@react-navigation/native": "~6.0.13",
    "@react-navigation/stack": "~6.3.2",
    "Base64": "^1.1.0",
    "deprecated-react-native-prop-types": "~4.1.0",
    "lodash": "^4.17.15",
    "moment": "^2.24.0",
    "moment-range": "^4.0.2",
    "rc-swipeout": "~2.0.11",
    "react-native-animatable": "^1.3.3",
    "react-native-blob-util": "~0.18.3",
    "react-native-camera": "~4.2.1",
    "react-native-draggable-flatlist": "~4.0.1",
    "react-native-elements": "~2.1.0",
    "react-native-fs": "~2.18.0",
    "react-native-gesture-handler": "~2.16.1",
    "react-native-image-picker": "2.3.0",
    "react-native-keyboard-aware-scroll-view": "~0.9.5",
    "react-native-linear-gradient": "^2.5.6",
    "react-native-markdown-renderer": "^3.2.8",
    "react-native-modal-selector": "~2.0.9",
    "react-native-orientation-locker": "1.4.0",
    "react-native-pdf": "~6.6.2",
    "react-native-reanimated": "~3.10.1",
    "react-native-safe-area-context": "4.10.1",
    "react-native-screens": "3.31.1",
    "react-native-signature-capture": "^0.4.10",
    "react-native-svg": "15.2.0",
    "react-native-svg-charts": "^5.3.0",
    "react-native-table-component": "~1.2.2",
    "react-native-vector-icons": "~9.2.0",
    "react-native-video": "~5.2.1",
    "react-native-webview": "13.8.6",
    "react-redux": "~7.2.9",
    "redux": "^4.0.4",
    "redux-persist": "^6.0.0",
    "redux-persist-filesystem-storage": "~4.2.0"
  },
  "devDependencies": {
    "@babel/core": "^7.20.0",
    "@babel/preset-env": "^7.20.0",
    "@babel/runtime": "^7.20.0",
    "@react-native/babel-preset": "0.73.21",
    "@react-native/eslint-config": "0.73.2",
    "@react-native/metro-config": "0.73.5",
    "@react-native/typescript-config": "0.73.1",
    "@types/react": "^18.2.6",
    "@types/react-test-renderer": "^18.0.0",
    "babel-jest": "^29.6.3",
    "eslint": "^8.19.0",
    "jest": "^29.6.3",
    "prettier": "2.8.8",
    "react-test-renderer": "18.2.0",
    "typescript": "5.0.4",
    "@babel/plugin-transform-class-properties": "~7.22.5",
    "@babel/plugin-transform-private-methods": "~7.22.5",
    "@testing-library/jest-native": "^5.4.2",
    "@testing-library/react-native": "^7.2.0",
    "babel-eslint": "^10.1.0",
    "eslint-plugin-react": "^7.20.6",
    "eslint-plugin-react-native": "~4.0.0",
    "patch-package": "~7.0.0"
  },
  "engines": {
    "node": ">=18"
  },
  "packageManager": "yarn@1.22.22+sha512.a6b2f7906b721bba3d67d4aff083df04dad64c399707841b7acf00f6b133b7ac24255f2652fa22ae3534329dc6180534e98d17432037ff6fd140556e2bb3137e"
}

Start by reproducing the issue with Corepack 0.28.2 and Node v18.20.2, using the package.json shown and running yarn install. Trace the code that inserts packageManager, then verify that the existing empty lines remain unchanged while the attribute is added.