Fix ambiguous wording of PrivateName access error

Signed-off-by: Max Heiber <[email protected]>

Author: mheiber

src/compiler/checker.ts

@@ -17867,7 +17867,7 @@ namespace ts {
             if (node.kind === SyntaxKind.PropertyAccessExpression && isPrivateName(node.name)) {
                 const declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop)!)!;
                 if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, Diagnostics.Property_0_is_only_accessible_within_class_1_because_it_has_a_private_name, symbolToString(prop), typeToString(getDeclaringClass(prop)!));
+                    error(errorNode, Diagnostics.Property_0_is_not_accessible_outside_class_1_because_it_has_a_private_name, symbolToString(prop), typeToString(getDeclaringClass(prop)!));
                     return false;
                 }
                 return true;

src/compiler/diagnosticMessages.json

@@ -4178,7 +4178,7 @@
         "category": "Error",
         "code": 18006
     },
-    "Property '{0}' is only accessible within class '{1}' because it has a private name.": {
+    "Property '{0}' is not accessible outside class '{1}' because it has a private name.": {
         "category": "Error",
         "code": 18007
     },

tests/baselines/reference/privateNameNotAccessibleOutsideDefiningClass.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/conformance/classes/members/privateNames/privateNameNotAccessibleOutsideDefiningClass.ts(5,9): error TS18007: Property '#foo' is only accessible within class 'A' because it has a private name.
+tests/cases/conformance/classes/members/privateNames/privateNameNotAccessibleOutsideDefiningClass.ts(5,9): error TS18007: Property '#foo' is not accessible outside class 'A' because it has a private name.
 
 
 ==== tests/cases/conformance/classes/members/privateNames/privateNameNotAccessibleOutsideDefiningClass.ts (1 errors) ====
@@ -8,5 +8,5 @@ tests/cases/conformance/classes/members/privateNames/privateNameNotAccessibleOut
 
     new A().#foo = 4;               // Error
             ~~~~
-!!! error TS18007: Property '#foo' is only accessible within class 'A' because it has a private name.
+!!! error TS18007: Property '#foo' is not accessible outside class 'A' because it has a private name.
 

tests/baselines/reference/privateNamesInGenericClasses.errors.txt

@@ -1,4 +1,4 @@
-tests/cases/conformance/classes/members/privateNames/privateNamesInGenericClasses.ts(10,3): error TS18007: Property '#foo' is only accessible within class 'C<T>' because it has a private name.
+tests/cases/conformance/classes/members/privateNames/privateNamesInGenericClasses.ts(10,3): error TS18007: Property '#foo' is not accessible outside class 'C<T>' because it has a private name.
 tests/cases/conformance/classes/members/privateNames/privateNamesInGenericClasses.ts(11,1): error TS2322: Type 'C<string>' is not assignable to type 'C<number>'.
   Type 'string' is not assignable to type 'number'.
 tests/cases/conformance/classes/members/privateNames/privateNamesInGenericClasses.ts(12,1): error TS2322: Type 'C<number>' is not assignable to type 'C<string>'.
@@ -17,7 +17,7 @@ tests/cases/conformance/classes/members/privateNames/privateNamesInGenericClasse
     declare let b: C<string>;
     a.#foo;                                   // OK
       ~~~~
-!!! error TS18007: Property '#foo' is only accessible within class 'C<T>' because it has a private name.
+!!! error TS18007: Property '#foo' is not accessible outside class 'C<T>' because it has a private name.
     a = b;                                    // Error
     ~
 !!! error TS2322: Type 'C<string>' is not assignable to type 'C<number>'.