Docs: Spell check

Author: sapegin

docs/Configuration.md

@@ -280,7 +280,7 @@ Dev server port.
 
 Type: `Boolean`, default: `false`
 
-Show or hide example code initially. It can be toggled in the UI by clicking the the Code button after each example.
+Show or hide example code initially. It can be toggled in the UI by clicking the Code button after each example.
 
 #### `showUsage`
 

docs/Development.md

@@ -2,7 +2,7 @@
 
 *For basics see [How to contribute](https://github.com/styleguidist/react-styleguidist/blob/master/.github/Contributing.md).*
 
-Styleguidist isn’t an ordinary single page app and some design decisions may look confusing to an outsider. In this guide we'll explain these decisions to un-confuse potential contributors.
+Styleguidist isn’t an ordinary single page app and some design decisions may look confusing to an outsider. In this guide we’ll explain these decisions to un-confuse potential contributors.
 
 The main thing is that we’re running two apps at the same time: user’s components and Styleguidist UI. They share a webpack configuration and have styles in the same scope (there’s only one scope in CSS). And we can control only one of these two apps: Styleguidist UI. That puts us under some restrictions:
 

docs/Thirdparties.md

@@ -147,7 +147,7 @@ module.exports = {
 
 ### Styled Components
 
-The [recommended way](https://github.com/styleguidist/react-styleguidist/issues/37#issuecomment-263502454) of using [Styled Components](https://styled-components.com/) is like this:
+The [recommended way](https://github.com/styleguidist/react-styleguidist/issues/37#issuecomment-263502454) of using [Styled Components](https://www.styled-components.com/) is like this:
 
 ```jsx
 import React from 'react';