Such indentation can make it look like the statement is inside the control statement, when in fact it will be executed unconditionally after the control statement.
Example:
class Bar {
void foo(int i) {
if (i == 0)
System.out.println("foo");
System.out.println("bar"); // warning
if (i == 1);
System.out.println("great"); // warning
if (i == 42)
System.out.println("answer");
System.out.println("question"); // warning
}
}