Comment and whitespace

app/controllers/projects/git_http_controller.rb

@@ -3,6 +3,17 @@ class Projects::GitHttpController < Projects::ApplicationController
   before_action :authenticate_user
   before_action :project_found?
 
+  # We support two actions (git push and git pull) which use four
+  # different HTTP requests:
+  #
+  # - GET /foo/bar.git/info/refs?service=git-upload-pack (pull)
+  # - GET /foo/bar.git/info/refs?service=git-receive-pack (push)
+  # - POST /foo/bar.git/git-upload-pack (pull)
+  # - POST /foo/bar.git/git-receive-pack" (push)
+  #
+  # The Rails routes divide these four requests over three methods:
+  # info_refs, git_upload_pack, and git_receive_pack.
+
   def git_rpc
     if upload_pack? && upload_pack_allowed?
       render_ok