Fix error in Commit to Ci::Commit delegation

app/models/commit.rb

@@ -10,7 +10,7 @@ class Commit
   attr_mentionable :safe_message, pipeline: :single_line
   participant :author, :committer, :notes
-  delegate :duration, :started_at, :finished_at, :coverage, to: :ci_commit
+  delegate :duration, :started_at, :finished_at, :coverage, to: :ci_commit, allow_nil: true
   attr_accessor :project

spec/requests/api/commits_spec.rb

@@ -34,7 +34,7 @@ describe API::API, api: true  do
     end
   end
-  describe "GET /projects:id/repository/commits/:sha" do
+  describe "GET /projects/:id/repository/commits/:sha" do
     context "authorized user" do
       it "should return a commit by sha" do
         get api("/projects/#{project.id}/repository/commits/#{project.repository.commit.id}", user)