documented making code blocks copy-able

Author: ncphillips

README.md

@@ -24,8 +24,9 @@ TINA=../path/to/tinacms TINA_WATCH=@tinacms/forms,react-tinacms-inline
 ```
 
 > ### Warning
-> This will only work for packages loaded by webpack. That means that environments which don't use 
-> webpack (i.e. SSR builds) will not use this alias. 
+>
+> This will only work for packages loaded by webpack. That means that environments which don't use
+> webpack (i.e. SSR builds) will not use this alias.
 
 ## Shortcodes
 
@@ -48,3 +49,25 @@ Call the shortcode in your content by writing the name of the component encased
 ### Shortcode Limitations
 
 Shortcodes must be standalone elements; "wrapping" shortcodes will not work.
+
+## Copy-able Code Blocks
+
+A "Copy" button can be added to Code Blocks by adding the `copy` tag to fenced code blocks.
+
+Non-copyable JS
+
+    ```js
+    const christmastPresent = new Banana()
+    ```
+
+Copyable JS
+
+    ```js,copy
+    const christmastPresent = new Banana()
+    ```
+
+Copyable Text
+
+    ```copy
+    Hello World
+    ```

content/docs/contributing/style-guide.md

@@ -29,6 +29,7 @@ This document should be used as a guideline when writing documentation and blog
   - "Code" in this case can include source code, terminal commands, variable names, and package names.
   - The above is not meant to be an exhaustive list, but use your best judgement.
   - Avoid `code tags` when discussing interface elements (such as navigation menus and in-app actions). Opt for **bold** text instead.
+  - Code blocks should be made [copy-able](https://github.com/tinacms/tinacms.org/blob/master/README.md#copy-able-code-block) unless they show more context then should be copied (i.e. `diffs`)
 - Important concepts should be formatted in **bold (strong emphasis)**.
 - Other points of emphasis can be formatted in _italics (normal emphasis)_, or **bold (strong emphasis)** as appropriate.
 - When _an emphasized phrase_ appears near a **highlighted concept**, opt for _italics_ over **bold** for the former.