codeclimate/codeclimate-rubocop

Checks that braces used for hash literals have or don't have
surrounding space depending on configuration.

### Example: EnforcedStyle: space
    # The `space` style enforces that hash literals have
    # surrounding space.

    # bad
    h = {a: 1, b: 2}

    # good
    h = { a: 1, b: 2 }

### Example: EnforcedStyle: no_space
    # The `no_space` style enforces that hash literals have
    # no surrounding space.

    # bad
    h = { a: 1, b: 2 }

    # good
    h = {a: 1, b: 2}

### Example: EnforcedStyle: compact
    # The `compact` style normally requires a space inside
    # hash braces, with the exception that successive left
    # braces or right braces are collapsed together in nested hashes.

    # bad
    h = { a: { b: 2 } }

    # good
    h = { a: { b: 2 }}