tweaked the text to be clearer about how to use the checklist
Merge pull request #2152 from fabpot/small-changes

tweaked the text to be clearer about how to use the checklist
[#2152] Slight fix
Adding an official format to be used for documentation pull requests - this follows closely with the new format introduced for the symfony core repository
Adding note to contributing docs so we can track the related code PR if applicable
[#2150] Tweaks per comments from @fabpot and @WouterJ
Merge pull request #2150 from symfony/docs-contributing

Adding an official format to be used for documentation pull requests
Change order static public to public static
Merge branch '2.0' into 2.1
[#2148] Bringing up one of the changes made by @franmomu