Improving copy of CONTRIBUTING.md, PROCESS.md, and code_review.md

Signed-off-by: Rémy Coutable <remy@rymai.me>

CONTRIBUTING.md

@@ -136,7 +136,7 @@ and ~"direction".
 A number of type labels have a priority assigned to them, which automatically
 makes them float to the top, depending on their importance.
-Type labels are always lowercase, but can have any color, besides blue (which is
+Type labels are always lowercase, and can have any color, besides blue (which is
 already reserved for subject labels).
 The descriptions on the [labels page][labels-page] explain what falls under each type label.
@@ -153,7 +153,7 @@ issue is labelled with a subject label corresponding to your expertise.
 Examples of subject labels are ~wiki, ~"container registry", ~ldap, ~api,
 ~issues, ~"merge requests", ~labels, and ~"container registry".
-Subject labels are always colored blue and all-lowercase.
+Subject labels are always all-lowercase.
 ### Team labels (~CI, ~Discussion, ~Edge, ~Frontend, ~Platform, etc.)
@@ -167,8 +167,8 @@ The current team labels are ~Build, ~CI, ~Discussion, ~Documentation, ~Edge,
 The descriptions on the [labels page][labels-page] explain what falls under the
 responsibility of each team.
-Team labels are always colored aqua, and are capitalized so that they show up as
-the first label for any issue.
+Team labels are always capitalized so that they show up as the first label for
+any issue.
 ### Priority labels (~Deliverable and ~Stretch)
@@ -255,12 +255,9 @@ every quarter.
 The most important thing is making sure valid issues receive feedback from the
 development team. Therefore the priority is mentioning developers that can help
-on those issues. Please select someone with relevant experience from
-[GitLab team][team]. If there is nobody mentioned with that expertise
-look in the commit history for the affected files to find someone. Avoid
-mentioning the lead developer, this is the person that is least likely to give a
-timely response. If the involvement of the lead developer is needed the other
-core team members will mention this person.
+on those issues. Please select someone with relevant experience from the
+[GitLab team][team]. If there is nobody mentioned with that expertise look in
+the commit history for the affected files to find someone.
 [described in our handbook]: https://about.gitlab.com/handbook/engineering/issues/issue-triage-policies/
 [issue bash events]: https://gitlab.com/gitlab-org/gitlab-ce/issues/17815
@@ -535,11 +532,11 @@ the feature you contribute through all of these steps.
 1. [Unit and system tests][testing] that pass on the CI server
 1. Performance/scalability implications have been considered, addressed, and tested
 1. [Documented][doc-styleguide] in the `/doc` directory
-1. [Changelog entry added][changelog]
+1. [Changelog entry added][changelog], if necessary
 1. Reviewed and any concerns are addressed
 1. Merged by a project maintainer
-1. Added to the release blog article if relevant
-1. Added to [the website](https://gitlab.com/gitlab-com/www-gitlab-com/) if relevant
+1. Added to the release blog article, if relevant
+1. Added to [the website](https://gitlab.com/gitlab-com/www-gitlab-com/), if relevant
 1. Community questions answered
 1. Answers to questions radiated (in docs/wiki/support etc.)

PROCESS.md

-## GitLab Core Team & GitLab Inc. Team Contributing Process
+## GitLab Core Team & GitLab Inc. Contribution Process
 ---

doc/development/code_review.md

@@ -95,8 +95,6 @@ experience, refactors the existing code). Then:
   "LGTM :thumbsup:", or "Just a couple things to address."
 - Assign the merge request to the author if changes are required following your
   review.
-- You should try to resolve merge conflicts yourself, using the [merge conflict
-  resolution][conflict-resolution] tool.
 - Set the milestone before merging a merge request.
 - Avoid accepting a merge request before the job succeeds. Of course, "Merge
   When Pipeline Succeeds" (MWPS) is fine.
@@ -105,7 +103,6 @@ experience, refactors the existing code). Then:
 - Consider using the [Squash and
   merge][squash-and-merge] feature when the merge request has a lot of commits.
-[conflict-resolution]: https://docs.gitlab.com/ce/user/project/merge_requests/resolve_conflicts.html#merge-conflict-resolution
 [squash-and-merge]: https://docs.gitlab.com/ee/user/project/merge_requests/squash_and_merge.html#squash-and-merge
 ### The right balance