Add note about parenthesis and link back to typescript guide.

docs/guides/typescript.md

@@ -5,7 +5,7 @@ nav: 8
 
 ## Basic usage
 
-The difference when using TypeScript is that instead of writing `create(...)`, you have to write `create<T>()(...)` (notice the extra parenthesis `()` too along with the type parameter) where `T` is the type of the state to annotate it. For example:
+The difference when using TypeScript is that instead of writing `create(...)`, you have to write `create<T>()(...)` (notice the extra parentheses `()` too along with the type parameter) where `T` is the type of the state to annotate it. For example:
 
 ```ts
 import { create } from 'zustand'

docs/integrations/immer-middleware.md

@@ -19,6 +19,8 @@ npm install immer
 
 ## Usage
 
+(Notice the extra parentheses after the type parameter as mentioned in the [Typescript Guide](../guides/typescript.md)).
+
 Updating simple states
 
 ```ts