fix typo in error

Author: zielinsky

compiler/src/dotty/tools/dotc/typer/Checking.scala

@@ -1602,7 +1602,7 @@ trait Checking {
     if !isEnumAnonCls then
       if cdef.mods.isEnumCase then
         if isJavaEnum then
-          report.error(em"paramerized case is not allowed in an enum that extends java.lang.Enum", cdef.srcPos)
+          report.error(em"parameterized case is not allowed in an enum that extends java.lang.Enum", cdef.srcPos)
       else if cls.is(Case) || firstParent.is(Enum) then
         // Since enums are classes and Namer checks that classes don't extend multiple classes, we only check the class
         // parent.

tests/neg/enum-constrs.scala

@@ -3,3 +3,8 @@ enum E[+T] extends java.lang.Enum[E[_]] { // error: An enum extending java.lang.
   case S1, S2
   case C() extends E[Int]
 }
+
+enum E2 extends java.lang.Enum[E2] {
+  case S1, S2
+  case C() extends E2 // error: parameterized case is not allowed
+}

tests/neg/trait-java-enum.scala

@@ -0,0 +1,5 @@
+trait T extends java.lang.Enum[T]
+
+enum MyEnum extends T { // error: enum class MyEnum extends java.lang.Enum[T], but the type argument must be the enum class itself
+  case A, B
+}

tests/run/enum-constrs.check

@@ -1,3 +1,2 @@
 Red
-S1
 Car