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vscode-prettier doesn't format according to defaults in prettier@2.0.2

See original GitHub issue

Summary

vscode-prettier doesn’t format according to defaults for prettier@2.0.2

Github Repository to Reproduce Issue

https://github.com/trivikr/prettier-vscode-test

Steps To Reproduce:

Clone the repo, and open it in VSCode
Install prettier-vscode extension v3.20.0
Run yarn to install dependencies
Open index.js, and add trailingComma at the end of array

Expected result

prettier-vscode should retain trailingComma as per prettier@2 defaults (link)

Actual result

prettier-vscode removes trailingComma

Additional information

Recording

prettier-vscode-test

VS Code Version: Version: 1.43.2 Commit: 0ba0ca52957102ca3527cf479571617f0de6ed50 Date: 2020-03-24T07:34:57.037Z Electron: 7.1.11 Chrome: 78.0.3904.130 Node.js: 12.8.1 V8: 7.8.279.23-electron.0 OS: Darwin x64 18.7.0

Prettier Extension Version: Extension Name: “prettier-vscode”. Extension Version: “3.20.0”.

OS and version: macOS 10.14.6 (18G4032)

Prettier Log Output

LOGS

["INFO" - 9:21:13 AM] Extension Name: "prettier-vscode".
["INFO" - 9:21:13 AM] Extension Version: "3.20.0".
["INFO" - 9:21:13 AM] Loaded module 'prettier@2.0.2' from '/Users/trivikr/workspace/prettier-vscode-test/node_modules/prettier/index.js'
["INFO" - 9:21:13 AM] Enabling prettier for languages
[
  "css",
  "graphql",
  "html",
  "javascript",
  "javascriptreact",
  "json",
  "json5",
  "jsonc",
  "less",
  "markdown",
  "mdx",
  "mongo",
  "postcss",
  "scss",
  "typescript",
  "typescriptreact",
  "vue",
  "yaml"
]
["INFO" - 9:21:13 AM] Enabling prettier for range supported languages
[
  "graphql",
  "javascript",
  "javascriptreact",
  "json",
  "typescript",
  "typescriptreact"
]
["INFO" - 9:21:38 AM] Formatting /Users/trivikr/workspace/prettier-vscode-test/index.js
["INFO" - 9:21:38 AM] Using ignore file (if present) at /Users/trivikr/workspace/prettier-vscode-test/.prettierignore
["INFO" - 9:21:38 AM] Loaded module 'prettier@2.0.2' from '/Users/trivikr/workspace/prettier-vscode-test/node_modules/prettier/index.js'
["INFO" - 9:21:38 AM] File Info:
{
  "ignored": false,
  "inferredParser": "babel"
}
["INFO" - 9:21:38 AM] No local configuration (i.e. .prettierrc or .editorconfig) detected, falling back to VS Code configuration
["INFO" - 9:21:38 AM] Prettier Options:
{
  "arrowParens": "avoid",
  "bracketSpacing": true,
  "endOfLine": "auto",
  "htmlWhitespaceSensitivity": "css",
  "insertPragma": false,
  "jsxBracketSameLine": false,
  "jsxSingleQuote": false,
  "printWidth": 80,
  "proseWrap": "preserve",
  "quoteProps": "as-needed",
  "requirePragma": false,
  "semi": true,
  "singleQuote": false,
  "tabWidth": 2,
  "trailingComma": "none",
  "useTabs": false,
  "vueIndentScriptAndStyle": false,
  "filepath": "/Users/trivikr/workspace/prettier-vscode-test/index.js",
  "parser": "babel"
}
["INFO" - 9:21:39 AM] Formatting completed in 56.96916ms.