Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,26 +1,16 @@
-# Web Platform Incubator Community Group
+Contributions to this repository are intended to become part of Recommendation-track documents governed by the W3C Patent Policy and Software and Document License. To make substantive contributions to specifications, you must either participate in the relevant W3C Working Group or make a non-member patent licensing commitment.
 
-This repository is being used for work in the W3C Web Platform Incubator Community Group, governed by the [W3C Community License
-Agreement (CLA)](http://www.w3.org/community/about/agreements/cla/). To make substantive contributions,
-you must join the CG.
+For our editing test-driven process, see CONTRIBUTING.md.
 
-If you are not the sole contributor to a contribution (pull request), please identify all
-contributors in the pull request comment.
+If you are not the sole contributor to a contribution (pull request), please identify all contributors in the pull request comment.
 
 To add a contributor (other than yourself, that's automatic), mark them one per line as follows:
 
-```
 +@github_username
-```
-
 If you added a contributor by mistake, you can remove them in a comment with:
 
-```
 -@github_username
-```
-
-If you are making a pull request on behalf of someone else but you had no part in designing the
-feature, you can remove yourself with the above syntax.
+If you are making a pull request on behalf of someone else but you had no part in designing the feature, you can remove yourself with the above syntax.
 
 # Tests