Improve readability of docs for extension field

Author: dzello

.all-contributorsrc

@@ -815,6 +815,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "dzello",
+      "name": "Josh Dzielak",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/174777?v=4",
+      "profile": "https://dzello.com",
+      "contributions": [
+        "doc"
+      ]
     }
   ]
 }

README.md

@@ -1,5 +1,5 @@
 # Netlify CMS
-[![All Contributors](https://img.shields.io/badge/all_contributors-94-orange.svg)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-95-orange.svg)](#contributors)
 [![Open Source Helpers](https://www.codetriage.com/netlify/netlify-cms/badges/users.svg)](https://www.codetriage.com/netlify/netlify-cms)
 [![](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/netlify/netlifycms)
 
@@ -63,7 +63,7 @@ Thanks goes to these wonderful people ([emoji key](https://github.com/kentcdodds
 | [<img src="https://avatars1.githubusercontent.com/u/3818?v=4" width="100px;"/><br /><sub><b>Edward Betts</b></sub>](http://edwardbetts.com/)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=EdwardBetts "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/8771435?v=4" width="100px;"/><br /><sub><b>Josh Hardman</b></sub>](https://github.com/jhardman0830)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=jhardman0830 "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/11616378?v=4" width="100px;"/><br /><sub><b>Mantas</b></sub>](https://behance.net/mistermantas)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=mistermantas "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/5244986?v=4" width="100px;"/><br /><sub><b>Marco Biedermann</b></sub>](https://www.marcobiedermann.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=marcobiedermann "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/7525670?v=4" width="100px;"/><br /><sub><b>Max Stoiber</b></sub>](https://mxstbr.blog/newsletter)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=mxstbr "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/89368?v=4" width="100px;"/><br /><sub><b>Vyacheslav Matyukhin</b></sub>](http://berekuk.ru)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=berekuk "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/9059048?v=4" width="100px;"/><br /><sub><b>jimmaaay</b></sub>](https://jimmythompson.me)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=jimmaaay "Code") |
 | [<img src="https://avatars3.githubusercontent.com/u/802086?v=4" width="100px;"/><br /><sub><b>Luís Miguel</b></sub>](https://github.com/Quicksaver)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3AQuicksaver "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=Quicksaver "Code") | [<img src="https://avatars2.githubusercontent.com/u/357379?v=4" width="100px;"/><br /><sub><b>Chris Swithinbank</b></sub>](http://chrisswithinbank.net/)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=delucis "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/1262221?v=4" width="100px;"/><br /><sub><b>remmah</b></sub>](https://github.com/remmah)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=remmah "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/29388?v=4" width="100px;"/><br /><sub><b>Sumeet Jain</b></sub>](http://sumeetjain.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=sumeetjain "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/26816046?v=4" width="100px;"/><br /><sub><b>Sagar Khatri</b></sub>](https://github.com/ragasirtahk)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=ragasirtahk "Documentation") [💡](#example-ragasirtahk "Examples") | [<img src="https://avatars0.githubusercontent.com/u/8182932?v=4" width="100px;"/><br /><sub><b>Kevin Doocey</b></sub>](https://www.dooceykev.in)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=Doocey "Code") | [<img src="https://avatars0.githubusercontent.com/u/31023010?v=4" width="100px;"/><br /><sub><b>Swieckowski</b></sub>](https://www.linkedin.com/in/arthur-swieckowski/)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Code") [📖](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Documentation") [⚠️](https://github.com/netlify/netlify-cms/commits?author=Swieckowski "Tests") |
 | [<img src="https://avatars2.githubusercontent.com/u/283419?v=4" width="100px;"/><br /><sub><b>Tim Carry</b></sub>](http://www.pixelastic.com/)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=pixelastic "Code") [🎨](#design-pixelastic "Design") [📖](https://github.com/netlify/netlify-cms/commits?author=pixelastic "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/30510616?v=4" width="100px;"/><br /><sub><b>Sol Park</b></sub>](https://github.com/solpark)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=solpark "Code") | [<img src="https://avatars0.githubusercontent.com/u/29218846?v=4" width="100px;"/><br /><sub><b>Michael Romani</b></sub>](https://github.com/michaelromani)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=michaelromani "Code") | [<img src="https://avatars1.githubusercontent.com/u/15175868?v=4" width="100px;"/><br /><sub><b>Xifeng Jin</b></sub>](http://linkedin/in/xifengjin88)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3Axifengjin88 "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=xifengjin88 "Code") | [<img src="https://avatars1.githubusercontent.com/u/372831?v=4" width="100px;"/><br /><sub><b>Pedro Duarte</b></sub>](http://pedroduarte.me)<br />[🐛](https://github.com/netlify/netlify-cms/issues?q=author%3Apeduarte "Bug reports") [💻](https://github.com/netlify/netlify-cms/commits?author=peduarte "Code") [📖](https://github.com/netlify/netlify-cms/commits?author=peduarte "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/6064830?v=4" width="100px;"/><br /><sub><b>Antonio Argote</b></sub>](http://antonioargote.com)<br />[🎨](#design-Strangehill "Design") | [<img src="https://avatars3.githubusercontent.com/u/1479451?v=4" width="100px;"/><br /><sub><b>Kristaps Taube</b></sub>](https://www.ktaube.com)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=ktaube "Code") |
-| [<img src="https://avatars3.githubusercontent.com/u/26639499?v=4" width="100px;"/><br /><sub><b>David Ko</b></sub>](https://github.com/daveyko)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=daveyko "Code") | [<img src="https://avatars3.githubusercontent.com/u/440562?v=4" width="100px;"/><br /><sub><b>Iñaki García</b></sub>](http://www.txorua.com)<br />[🎨](#design-igarbla "Design") | [<img src="https://avatars3.githubusercontent.com/u/27162255?v=4" width="100px;"/><br /><sub><b>Sam</b></sub>](https://github.com/gazebosx3)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=gazebosx3 "Code") |
+| [<img src="https://avatars3.githubusercontent.com/u/26639499?v=4" width="100px;"/><br /><sub><b>David Ko</b></sub>](https://github.com/daveyko)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=daveyko "Code") | [<img src="https://avatars3.githubusercontent.com/u/440562?v=4" width="100px;"/><br /><sub><b>Iñaki García</b></sub>](http://www.txorua.com)<br />[🎨](#design-igarbla "Design") | [<img src="https://avatars3.githubusercontent.com/u/27162255?v=4" width="100px;"/><br /><sub><b>Sam</b></sub>](https://github.com/gazebosx3)<br />[💻](https://github.com/netlify/netlify-cms/commits?author=gazebosx3 "Code") | [<img src="https://avatars1.githubusercontent.com/u/174777?v=4" width="100px;"/><br /><sub><b>Josh Dzielak</b></sub>](https://dzello.com)<br />[📖](https://github.com/netlify/netlify-cms/commits?author=dzello "Documentation") |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors](https://github.com/kentcdodds/all-contributors) specification. Contributions of any kind welcome!

website/site/content/docs/configuration-options.md

@@ -88,7 +88,7 @@ The last few options require more detailed information.
 
 These settings determine how collection files are parsed and saved. Both are optional—Netlify CMS will attempt to infer your settings based on existing items in the collection. If your collection is empty, or you'd like more control, you can set these fields explicitly.
 
-`extension` determines the file extension searched for when finding existing entries in a folder collection determines the file extension saved for new collection items. It accepts the following values: `yml`, `yaml`, `toml`, `json`, `md`, `markdown`, `html`.
+`extension` determines the file extension searched for when finding existing entries in a folder collection and it determines the file extension used to save new collection items. It accepts the following values: `yml`, `yaml`, `toml`, `json`, `md`, `markdown`, `html`.
 
 You may also specify a custom `extension` not included in the list above, as long as the collection files can be parsed and saved in one of the supported formats below.