Add missing new line back

src/Terminal.ts

@@ -1922,6 +1922,7 @@ export class Terminal extends EventEmitter implements ITerminal, IDisposable, II
 /**
  * Helpers
  */
+
 function wasModifierKeyOnlyEvent(ev: KeyboardEvent): boolean {
   return ev.keyCode === 16 || // Shift
     ev.keyCode === 17 || // Ctrl