The sniper printer does not work as expected in a line break context (style issue)

[fermadeiral]

Hi all,

I have the following code:

        void foo(int x) {
		new IllegalArgumentException("x must be nonnegative");
	}

I want to add a throw in the constructor call new IllegalArgumentException. The transformation works just fine (no exception, the printed code is correct), but a line break is missing, so I get:

        void foo(int x) {throw new java.lang.IllegalArgumentException("x must be nonnegative");
	}

Instead of:

        void foo(int x) {
		throw new java.lang.IllegalArgumentException("x must be nonnegative");
	}

I am opening a PR with a failing test case to reproduce the issue.

[nharrand]

After investigation, it seems that the problem appears for any modified statment in position 0 of a CtBlock.

[monperrus]

closed per #3400