Merge branch 'update-mr-template2' into 'develop'

Add clang-format-diff command line to MR checklist

See merge request orfeotoolbox/otb!472

.gitlab/merge_request_templates/request_for_changes.md

@@ -45,3 +45,4 @@ The copyright owner is *COPYRIGHT OWNER (OR OWNER'S AGENT)* and has signed the O
 - The feature branch is (reasonably) up-to-date with the base branch
 - Dashboard is green
 - Copyright owner has signed the ORFEO ToolBox Contributor License Agreement
+- Optionally, run `git diff develop... -U0 --no-color | clang-format-diff.py -p1 -i` on latest changes and commit