Method snippet completion shouldn't add newline unless followed by another member

[DanielRosenwasser]

interface Greeter {
    greet(name: string): string;
}

class Jeeves implements Greeter {
    constructor() {

    }

    /**/
}

Request completion at /**/, and select greet

Expected

interface Greeter {
    greet(name: string): string;
}

class Jeeves implements Greeter {
    constructor() {

    }

    greet(name: string): string {
        
    }
}

Actual

interface Greeter {
    greet(name: string): string;
}

class Jeeves implements Greeter {
    constructor() {

    }

    greet(name: string): string {
        
    }

}

[gabritto]

I expect fixing this issue to be a bit tricky, so I'm gonna go ahead and start working on it.