Add test cases for multi-line wrapping of parameters for the constructor function

Author: NathanLovato

tests/expected/func_constructor_args_multiline.gd

@@ -0,0 +1,10 @@
+func _init(
+		init_mob: Mob3D,
+		init_spawning_point: Node3D,
+		init_projectile_scene: PackedScene
+) -> void:
+	pass
+
+
+func _init(a, b: int, c: String) -> void:
+	pass

tests/input/func_constructor_args_multiline.gd

@@ -0,0 +1,8 @@
+func _init(init_mob: Mob3D,
+	init_spawning_point: Node3D, init_projectile_scene: PackedScene
+) -> void:
+	pass
+
+
+func _init(a, b: int, c: String) -> void:
+	pass