docs: fix immutablejs doc domain (#2655)

Readme.md

@@ -38,7 +38,7 @@
 
 Slate lets you build rich, intuitive editors like those in [Medium](https://medium.com/), [Dropbox Paper](https://www.dropbox.com/paper) or [Google Docs](https://www.google.com/docs/about/)—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity.
 
-It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what _is_ or _isn't_ in "core". You can think of it like a pluggable implementation of `contenteditable` built on top of [React](https://facebook.github.io/react/) and [Immutable](https://facebook.github.io/immutable-js/). It was inspired by libraries like [Draft.js](https://facebook.github.io/draft-js/), [Prosemirror](http://prosemirror.net/) and [Quill](http://quilljs.com/).
+It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what _is_ or _isn't_ in "core". You can think of it like a pluggable implementation of `contenteditable` built on top of [React](https://facebook.github.io/react/) and [Immutable](https://immutable-js.github.io/immutable-js/). It was inspired by libraries like [Draft.js](https://facebook.github.io/draft-js/), [Prosemirror](http://prosemirror.net/) and [Quill](http://quilljs.com/).
 
 > 🤖 **Slate is currently in beta**. Its core API is useable now, but you might need to pull request a fix or two for advanced use cases. Some of its APIs are not "finalized" and will (breaking) change over time as we discover better solutions.
 

docs/Introduction.md

@@ -4,7 +4,7 @@
 
 Slate lets you build rich, intuitive editors like those in [Medium](https://medium.com/), [Dropbox Paper](https://www.dropbox.com/paper) or [Google Docs](https://www.google.com/docs/about/)—which are becoming table stakes for applications on the web—without your codebase getting mired in complexity.
 
-It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what _is_ or _isn't_ in "core". You can think of it like a pluggable implementation of `contenteditable` built on top of [React](https://facebook.github.io/react/) and [Immutable](https://facebook.github.io/immutable-js/). It was inspired by libraries like [Draft.js](https://facebook.github.io/draft-js/), [Prosemirror](http://prosemirror.net/) and [Quill](http://quilljs.com/).
+It can do this because all of its logic is implemented with a series of plugins, so you aren't ever constrained by what _is_ or _isn't_ in "core". You can think of it like a pluggable implementation of `contenteditable` built on top of [React](https://facebook.github.io/react/) and [Immutable](https://immutable-js.github.io/immutable-js/). It was inspired by libraries like [Draft.js](https://facebook.github.io/draft-js/), [Prosemirror](http://prosemirror.net/) and [Quill](http://quilljs.com/).
 
 > 🤖 **Slate is currently in beta**. Its core API is useable now, but you might need to pull request fixes for advanced use cases. Some of its APIs are not "finalized" and will (breaking) change over time as we find better solutions.
 

docs/general/resources.md

@@ -13,7 +13,7 @@ These libraries are helpful when developing with Slate:
 
 These tools are helpful when developing with Slate:
 
-* [Immutable.js Console Extension](https://github.com/mattzeunert/immutable-object-formatter-extension) greatly improves the `console.log` output when working with [Immutable.js](https://facebook.github.io/immutable-js/) objects, which Slate's data model is based on.
+* [Immutable.js Console Extension](https://github.com/mattzeunert/immutable-object-formatter-extension) greatly improves the `console.log` output when working with [Immutable.js](https://immutable-js.github.io/immutable-js/) objects, which Slate's data model is based on.
 
 ## Products
 

docs/guides/data-model.md

@@ -12,9 +12,9 @@ Because it mirrors the DOM, Slate's data model features a [`Document`](../refere
 
 ## Immutable Objects
 
-Slate's data model is built out of [`Immutable.js`](https://facebook.github.io/immutable-js/) objects. This allows us to make rendering much more performant, and it ensures that we don't end up with hard to track down bugs due to accidentally modifying objects in-place.
+Slate's data model is built out of [`Immutable.js`](https://immutable-js.github.io/immutable-js/) objects. This allows us to make rendering much more performant, and it ensures that we don't end up with hard to track down bugs due to accidentally modifying objects in-place.
 
-Specifically, Slate's models are [`Immutable.Record`](https://facebook.github.io/immutable-js/docs/#/Record) objects, which makes them very similar to JavaScript objects for retrieiving values:
+Specifically, Slate's models are [`Immutable.Record`](https://immutable-js.github.io/immutable-js/docs/#/Record) objects, which makes them very similar to JavaScript objects for retrieiving values:
 
 ```js
 const block = Block.create({ type: 'paragraph' })
@@ -23,11 +23,11 @@ block.object // "block"
 block.type // "paragraph"
 ```
 
-But for updating values, you'll need to use the [`Immutable.Record` API](https://facebook.github.io/immutable-js/docs/#/Record/set).
+But for updating values, you'll need to use the [`Immutable.Record` API](https://immutable-js.github.io/immutable-js/docs/#/Record/set).
 
 Collections of Slate objects are represented as immutable `Lists`, `Sets`, `Stacks`, etc, which means we get nice support for expressive methods like `filter`, `includes`, `take`, `skip`, `rest` and `last`.
 
-If you haven't used Immutable.js before, there is definitely a learning curve. Before you dive into Slate, you should check out the [Immutable.js docs](https://facebook.github.io/immutable-js/docs/#/). Once you get the hang of it, it won't slow you down at all, but it will take a few days to get used to, and you might write things suboptimally at first.
+If you haven't used Immutable.js before, there is definitely a learning curve. Before you dive into Slate, you should check out the [Immutable.js docs](https://immutable-js.github.io/immutable-js/docs/#/). Once you get the hang of it, it won't slow you down at all, but it will take a few days to get used to, and you might write things suboptimally at first.
 
 ## The "Value"
 

docs/reference/slate/data.md

@@ -4,7 +4,7 @@
 import { Data } from 'slate'
 ```
 
-Data is simply a thin wrapper around [`Immutable.Map`](https://facebook.github.io/immutable-js/docs/#/Map), so that you don't need to ever depend on Immutable directly, and for future compatibility.
+Data is simply a thin wrapper around [`Immutable.Map`](https://immutable-js.github.io/immutable-js/docs/#/Map), so that you don't need to ever depend on Immutable directly, and for future compatibility.
 
 A data object can have any properties associated with it.