fix: remove trailing lines in lox files

Author: ryan-gang

test_programs/i1/2.lox

@@ -11,4 +11,4 @@ expected_error_type: none
   print A();
   print B();
   print C();
-}
+}

test_programs/i1/3.lox

@@ -8,4 +8,4 @@ fun f() {
   return B;
 }
 
-print f(); // expect: B
+print f(); // expect: B

test_programs/i1/4.lox

@@ -1,4 +1,4 @@
 ---
 expected_error_type: compile
 ---
-class Foo < Foo {} // Error at 'Foo': A class can't inherit from itself.
+class Foo < Foo {} // Error at 'Foo': A class can't inherit from itself.

test_programs/i2/1.lox

@@ -9,4 +9,4 @@ class Doughnut {
 
 class BostonCream < Doughnut {}
 
-BostonCream().cook();
+BostonCream().cook();

test_programs/i2/3.lox

@@ -12,4 +12,4 @@ class Bar < Foo {}
 class Baz < Bar {}
 
 var baz = Baz();
-print baz.secret; // expect: 1
+print baz.secret; // expect: 1

test_programs/i2/4.lox

@@ -22,4 +22,4 @@ class Baz < Bar {
 var baz = Baz();
 baz.inFoo(); // expect: in foo
 baz.inBar(); // expect: in bar
-baz.inBaz(); // expect: in baz
+baz.inBaz(); // expect: in baz

test_programs/i3/3.lox

@@ -26,4 +26,4 @@ class C < B {
   }
 }
 
-C().getClosure()(); // expect: A
+C().getClosure()(); // expect: A

test_programs/i3/5.lox

@@ -17,4 +17,4 @@ class Derived < Base {
 }
 
 var closure = Derived().getClosure();
-print closure(); // expect: Base
+print closure(); // expect: Base

test_programs/i3/6.lox

@@ -16,4 +16,4 @@ class Derived < Base {
 
 Derived().foo();
 // expect: Derived.foo()
-// expect: Base.foo()
+// expect: Base.foo()

test_programs/i3/7.lox

@@ -18,4 +18,4 @@ class C < B {
 
 C().foo();
 // expect: C.foo()
-// expect: A.foo()
+// expect: A.foo()