Fix mentionable specs

spec/models/commit_spec.rb

@@ -89,9 +89,9 @@ eos
   end
 
   it_behaves_like 'a mentionable' do
-    subject { commit }
+    subject { create(:project).commit }
 
-    let(:author) { create(:user, email: commit.author_email) }
+    let(:author) { create(:user, email: subject.author_email) }
     let(:backref_text) { "commit #{subject.id}" }
     let(:set_mentionable_text) do
       ->(txt) { allow(subject).to receive(:safe_message).and_return(txt) }

spec/models/issue_spec.rb

@@ -69,7 +69,7 @@ describe Issue do
   end
 
   it_behaves_like 'an editable mentionable' do
-    subject { create(:issue, project: project) }
+    subject { create(:issue) }
 
     let(:backref_text) { "issue #{subject.to_reference}" }
     let(:set_mentionable_text) { ->(txt){ subject.description = txt } }

spec/models/note_spec.rb

@@ -192,10 +192,9 @@ describe Note do
   end
 
   it_behaves_like 'an editable mentionable' do
-    subject { create :note, noteable: issue, project: project }
+    subject { create :note, noteable: issue, project: issue.project }
 
-    let(:project) { create(:project) }
-    let(:issue) { create :issue, project: project }
+    let(:issue) { create :issue }
     let(:backref_text) { issue.gfm_reference }
     let(:set_mentionable_text) { ->(txt) { subject.note = txt } }
   end

spec/support/mentionable_shared_examples.rb

@@ -5,7 +5,7 @@
 # - let(:set_mentionable_text) { lambda { |txt| "block that assigns txt to the subject's mentionable_text" } }
 
 def common_mentionable_setup
-  let(:project) { create :project }
+  let(:project) { subject.project }
   let(:author)  { subject.author }
 
   let(:mentioned_issue)  { create(:issue, project: project) }