$ cat AnimationBlock.swift
UIView.animateWithDuration(
    0.2,
    animations: {
        self.layoutIfNeeded()
        self.underline.show()
    },
    completion: {
        _ in
        completion()
    }
)
$ swiftlint lint --path AnimationBlock.swift
Loading configuration from '.swiftlint.yml'
Linting Swift files at path AnimationBlock.swift
Linting 'AnimationBlock.swift' (1/1)
/Users/toshi0383/dvideo/tv/app/AnimationBlock.swift:9:5: warning: Closing Brace Spacing Violation: Closing brace with closing parenthesis should not have any whitespaces in the middle. (closing_brace)
Done linting! Found 1 violation, 0 serious in 1 file.

$ swiftlint version
0.9.2