docs: More tweaks to text and formatting.

Author: microbit-carlos

CONTRIBUTING.md

@@ -3,10 +3,12 @@
 Thanks for looking here! We'd love your help. The micro:bit project is only
 possible through contributions of companies and individuals around the world.
 
-This project is managed on GitHub, and the best way to contribute is to jump in
-and fix/file issues.
+This project is managed on GitHub, and the best way to contribute is to jump
+into the GitHub issue tracker to see what is available. Planned features are
+marked with the "enhancement" label, and know issues are marked with the "bug"
+label.
 
 https://github.com/microbit-foundation/microbit-universal-hex
 
-If you're interested in working on any of these items, please file an issue
-and mention @microbit-carlos.
+If you're interested in working on any of these items, please respond to an
+existing issue, or file a new one, and mention @microbit-carlos.

docs/api-docs.md

@@ -10,7 +10,7 @@ The API documentation is generated independently of the rest of these docs and
 can be found in this URL:
 [https://microbit-foundation.github.io/microbit-universal-hex/api/](https://microbit-foundation.github.io/microbit-universal-hex/api/)
 
-[Click here to open the API docs](api/){: .btn .btn-purple }
+[Click here to go to the API docs](api/){: .btn .btn-purple }
 
 The source code is well annotated with docstring and
 [TypeDoc](http://typedoc.org) is used to generate the API pages.

docs/contributing.md

@@ -12,8 +12,7 @@ nav_order: 5
 
 {: .no_toc .text-delta }
 
-1. TOC
-   {:toc}
+1. TOC {:toc}
 
 ## How To Contribute
 
@@ -32,7 +31,7 @@ existing issue, or file a new one, and mention @microbit-carlos.
 
 ## Code Of Conduct
 
-WIP.
+A link to the Code of Conduct will soon be added here.
 
 ## Bugs