Tell us about your environment

• ESLint Version: 6.3.0
• Node Version: 10.16.0
• npm Version: 6.9.0

What parser (default, Babel-ESLint, etc.) are you using?

default

Please show your full configuration:

module.exports = {
  parserOptions: {
    ecmaVersion: 2015,
  }
};

What did you do? Please include the actual source code causing the issue, as well as the command that you used to run ESLint.

Demo link

/*eslint computed-property-spacing: ["error", "always"]*/

const foo = {
  [ (a) ]: 1
}

eslint index.js --fix

What did you expect to happen?

No errors.

What actually happened? Please include the actual, raw output from ESLint.

4:5  error  A space is required after '('   computed-property-spacing
4:7  error  A space is required before ')'  computed-property-spacing

Fixed to:

/*eslint computed-property-spacing: ["error", "always"]*/

const foo = {
  [ ( a ) ]: 1
}

Are you willing to submit a pull request to fix this bug?

Yes.

It would be also good to clarify how should the rule handle comments.