Merge pull request reduxjs#844 from xuoe/fix-docs

Motivation.md: minor rewording

Author: gaearon

docs/introduction/Motivation.md

@@ -4,7 +4,7 @@ As the requirements to JavaScript single-page applications get more sophisticate
 
 Managing ever-changing state is hard. If a model can update another model, then a view can update a model that updates another model, and this, in turn, might cause another view to update. At some point you no longer know what happens in your app. **You no longer control when, why, and how the state is updated.** When the system is opaque and non-deterministic, it’s hard to reproduce bugs or add new features.
 
-As if this wasn’t bad enough, consider the **new requirements becoming common in front-end product development**, such as handling optimistic updates, rendering on the server, fetching data before performing route transitions, and so on. We the front-end developers are finding ourselves surrounded by the complexity we never had to deal with before. [Is it time we give up?](http://www.quirksmode.org/blog/archives/2015/07/stop_pushing_th.html)
+As if this wasn’t bad enough, consider the **new requirements becoming common in front-end product development**, such as handling optimistic updates, rendering on the server, fetching data before performing route transitions, and so on. As front-end developers, we find ourselves surrounded by complexity we never had to deal with before, but [is it time to give up?](http://www.quirksmode.org/blog/archives/2015/07/stop_pushing_th.html)
 
 A lot of this complexity comes from the fact that **we’re mixing two concepts** that are very hard for the human mind to reason about: **mutation and asynchronicity.** I call them [Mentos and Coke](https://en.wikipedia.org/wiki/Diet_Coke_and_Mentos_eruption). Both can be great in separation, but together, they are a mess. Libraries like [React](http://facebook.github.io/react) attempt to solve this problem in the view layer by removing asynchrony and direct DOM manipulation. However, React leaves managing the state of your data up to you.