Additional fix for #110 in a strong mode

Author: Sergey G. Grekhov

Language/Functions/async_return_type_t02.dart

@@ -11,6 +11,7 @@
  * return type of asynchronous function may not be assigned to Future but is
  * void.
  *
+ * @compile-error
  * @author [email protected]
  */
 

Language/Functions/generator_return_type_t02.dart

@@ -9,10 +9,11 @@
  * the declared return type of a function marked async* may not be assigned
  * to Stream.
  *
- * @description Check that it is no compile error, if the declared
+ * @description Check that it is a compile error, if the declared
  * return type of synchronous generator function may not be assigned
  * to Iterable but is void.
  *
+ * @compile-error
  * @author [email protected]
  */
 

Language/Functions/generator_return_type_t06.dart

@@ -9,10 +9,11 @@
  * the declared return type of a function marked async* may not be assigned
  * to Stream.
  *
- * @description Check that it is no compile error, if the declared
+ * @description Check that it is a compile error, if the declared
  * return type of a function marked async* may not be assigned to Stream but is
  * void.
  *
+ * @compile-error
  * @author [email protected]
  */
 

Language/Types/Type_Void/returning_t03.dart

@@ -10,7 +10,8 @@
  * checked mode, a dynamic type error would arise if a non-null object was
  * returned from a void method (since no object has runtime type dynamic).
  * @description Checks that returning a non-null value with non-dynamic static
- * type from within a void method produces no error.
+ * type from within a void method produces compile error.
+ * @compile-error
  * @author rodionov
  */
 

Language/Types/Type_Void/returning_t04.dart

@@ -10,7 +10,8 @@
  * checked mode, a dynamic type error would arise if a non-null object was
  * returned from a void method (since no object has runtime type dynamic).
  * @description Checks that returning a non-null value with non-dynamic static
- * type from within a void method produces no error.
+ * type from within a void method produces compile error.
+ * @compile-error
  * @author rodionov
  */
 

Language/Types/Type_Void/returning_t05.dart

@@ -10,7 +10,8 @@
  * checked mode, a dynamic type error would arise if a non-null object was
  * returned from a void method (since no object has runtime type dynamic).
  * @description Checks that returning a non-null value with non-dynamic static
- * type from within a void method produces no error.
+ * type from within a void method produces compile error.
+ * @compile-error
  * @author rodionov
  */