Noop when moving a symbol into the file it is already in (microsoft#183866)

Fixes microsoft#183793

Author: mjbvz

extensions/typescript-language-features/src/languageFeatures/refactor.ts

@@ -145,7 +145,7 @@ class MoveToFileRefactorCommand implements Command {
 		}
 
 		const targetFile = await this.getTargetFile(args.document, file, args.range);
-		if (!targetFile) {
+		if (!targetFile || targetFile.toString() === file.toString()) {
 			return;
 		}