fix(auto-reply): coalesce block replies and document streaming toggles (#536) (thanks @mcinteerj)

src/auto-reply/reply.block-streaming.test.ts

@@ -149,7 +149,7 @@ describe("block streaming", () => {
 
       const res = await replyPromise;
       expect(res).toBeUndefined();
-      expect(seen).toEqual(["first", "second"]);
+      expect(seen).toEqual(["first\n\nsecond"]);
     });
   });