Revert accidental commits

Author: sgrekhov

Language/Enums/syntax_t08.dart

@@ -20,4 +20,6 @@ enum E {a,, b}
 
 main() {
   E e = E.b;
+//        ^
+// [cfe] unspecified
 }

Language/Enums/syntax_t09.dart

@@ -11,11 +11,14 @@
 /// comma in the end of member list.
 /// @author [email protected]
 
+
 enum E {a, b,, }
 //           ^
 // [analyzer] unspecified
 // [cfe] unspecified
 
 main() {
   E e = E.b;
+//        ^
+// [cfe] unspecified
 }

Language/Functions/Formal_Parameters/Optional_Formals/syntax_t12.dart

@@ -14,11 +14,14 @@
 /// brackets are mixed in an optional parameters declaration.
 /// @author rodionov
 
+
 foo({const p: 1]) {
 //              ^
 // [analyzer] unspecified
 // [cfe] unspecified
   p = 1;
+//^
+// [cfe] unspecified
 }
 
 main() {

Language/Functions/Formal_Parameters/Optional_Formals/syntax_t13.dart

@@ -14,6 +14,7 @@
 /// brackets are mixed in an optional parameters declaration.
 /// @author rodionov
 
+
 foo([int p = 1}) {
 //             ^
 // [analyzer] unspecified

Language/Functions/Formal_Parameters/Required_Formals/syntax_t03.dart

@@ -27,11 +27,14 @@
 /// declared as const
 /// @author msyabro
 
+
 func(const x) {
 //   ^
 // [analyzer] unspecified
 // [cfe] unspecified
   x = 1;
+//^
+// [cfe] unspecified
 }
 
 main() {

LanguageFeatures/Enhanced-Enum/implementing_enum_A04_t25.dart

@@ -25,6 +25,9 @@ enum E1 {
   e3;
 
   String toString([int index = 0]) => "E1";
+  bool operator ==(covariant E1 other) {
+    return true;
+  }
 }
 
 enum E2<T> {
@@ -35,13 +38,25 @@ enum E2<T> {
   const E2(T t);
 
   String toString([int index = 0]) => "E2";
+  bool operator ==(covariant E2 other) {
+    return false;
+  }
 }
 
 main() {
   Expect.equals("E1", E1.e1.toString());
   Expect.equals("E1", E1.e2.toString(1));
   Expect.equals("E1", E1.e3.toString());
+  Expect.isTrue(E1.e1 == E1.e2);
+  Expect.isTrue(E1.e1 == E1.e3);
+  Expect.isTrue(E1.e3 == E1.e2);
   Expect.equals("E2", E2.e1.toString());
   Expect.equals("E2", E2.e2.toString(1));
   Expect.equals("E2", E2.e3.toString());
+  Expect.isFalse(E2.e1 == E2.e2);
+  Expect.isFalse(E2.e1 == E2.e3);
+  Expect.isFalse(E2.e3 == E2.e2);
+  Expect.isFalse(E2.e1 == E2.e1);
+  Expect.isFalse(E2.e2 == E2.e2);
+  Expect.isFalse(E2.e3 == E2.e3);
 }