Fix layout

CONTRIBUTING.md

@@ -119,7 +119,6 @@ By making a contribution to the Docker Project ("Project"), I represent and warr
 
 a. The contribution was created in whole or in part by me and I have the right to submit the contribution on my own behalf or on behalf of a third party who has authorized me to submit this contribution to the Project; or
 
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 b. The contribution is based upon previous work that, to the best of my knowledge, is covered under an appropriate open source license and I have the right and authorization to submit that work with modifications, whether created in whole or in part by me, under the same open source license (unless I am permitted to submit under a different license) that I have identified in the contribution; or
 
 c. The contribution was provided directly to me by some other person who represented and warranted (a) or (b) and I have not modified it.