fix typo

src/languageFeatures.ts

@@ -83,7 +83,7 @@ export abstract class Adapter {
 
 // --- diagnostics --- ---
 
-export class DiagnostcsAdapter extends Adapter {
+export class DiagnosticsAdapter extends Adapter {
 
 	private _disposables: IDisposable[] = [];
 	private _listener: { [uri: string]: IDisposable } = Object.create(null);

src/tsMode.ts

@@ -65,7 +65,7 @@ function setupMode(defaults: LanguageServiceDefaultsImpl, modeId: string): (firs
 	monaco.languages.registerDocumentRangeFormattingEditProvider(modeId, new languageFeatures.FormatAdapter(worker));
 	monaco.languages.registerOnTypeFormattingEditProvider(modeId, new languageFeatures.FormatOnTypeAdapter(worker));
 	monaco.languages.registerRenameProvider(modeId, new languageFeatures.RenameAdapter(worker));
-	new languageFeatures.DiagnostcsAdapter(defaults, modeId, worker);
+	new languageFeatures.DiagnosticsAdapter(defaults, modeId, worker);
 
 	return worker;
 }