[analyzer] Fix message for ENUM_WITHOUT_CONSTANTS

This will resolves #60053

Bug: #60053
Change-Id: I245814c60668f045b3fdb01358637bb142989640
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/408440
Commit-Queue: Jaime Wren <[email protected]>
Reviewed-by: Brian Wilkerson <[email protected]>

Author: jwren

pkg/analyzer/lib/src/error/codes.g.dart

@@ -1546,8 +1546,8 @@ class CompileTimeErrorCode extends ErrorCode {
   static const CompileTimeErrorCode ENUM_WITHOUT_CONSTANTS =
       CompileTimeErrorCode(
     'ENUM_WITHOUT_CONSTANTS',
-    "The enum must have at least one constant.",
-    correctionMessage: "Try declaring a constant.",
+    "The enum must have at least one enum constant.",
+    correctionMessage: "Try declaring an enum constant.",
   );
 
   ///  Parameters:

pkg/analyzer/messages.yaml

@@ -4575,8 +4575,8 @@ CompileTimeErrorCode:
 
       Rename the enum to something other than `values`.
   ENUM_WITHOUT_CONSTANTS:
-    problemMessage: The enum must have at least one constant.
-    correctionMessage: Try declaring a constant.
+    problemMessage: The enum must have at least one enum constant.
+    correctionMessage: Try declaring an enum constant.
     hasPublishedDocs: false
   EQUAL_ELEMENTS_IN_CONST_SET:
     problemMessage: "Two elements in a constant set literal can't be equal."