Do not offer completions for default module member symbol (#55231)

Author: Andarist

src/compiler/checker.ts

@@ -45463,7 +45463,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             if (meaning) {
                 source.forEach(symbol => {
                     // Similar condition as in `resolveNameHelper`
-                    if (!getDeclarationOfKind(symbol, SyntaxKind.ExportSpecifier) && !getDeclarationOfKind(symbol, SyntaxKind.NamespaceExport)) {
+                    if (!getDeclarationOfKind(symbol, SyntaxKind.ExportSpecifier) && !getDeclarationOfKind(symbol, SyntaxKind.NamespaceExport) && symbol.escapedName !== InternalSymbolName.Default) {
                         copySymbol(symbol, meaning);
                     }
                 });

tests/cases/fourslash/completionsDefaultKeywordWhenDefaultExportAvailable.ts

@@ -0,0 +1,16 @@
+/// <reference path="fourslash.ts" />
+
+// https://github.com/microsoft/TypeScript/issues/3229
+
+// @filename: index.ts
+
+//// export default function () {}
+//// def/*1*/
+
+verify.completions(
+    { 
+        marker: "1", 
+        includes: [{ name: "default", kind: "keyword", sortText: completion.SortText.GlobalsOrKeywords }],
+    },
+);
+