#end // comment breaks formatting

[Gama11]

Input file

#if js
class JS {
	var foo:Int;
}
#else
class NotJS {
	var foo:Int;
}
#end // js

Broken output

#if js class JS {
	var foo:Int;
} #else class NotJS {
	var foo:Int;
} #end // js

Some instances of this can be seen here: openfl/lime@dfe3d27