Fix rubocop offenses

app/models/merge_request.rb

@@ -1576,13 +1576,13 @@ class MergeRequest < ApplicationRecord
     !merge_commit.has_been_reverted?(current_user, notes_association)
   end
 
-  def is_reverted?(current_user)
+  def reverted_by_merge_request?(current_user)
     !!reverting_merge_request(current_user)
   end
 
   def reverting_merge_request(current_user)
-    return nil unless merge_commit
-    return nil unless merged_at
+    return unless merge_commit
+    return unless merged_at
 
     cutoff = merged_at - 1.minute
 
@@ -1590,12 +1590,14 @@ class MergeRequest < ApplicationRecord
 
     reverting_commit = merge_commit.reverting_commit(current_user, notes_association)
 
-    MergeRequestsFinder.new(
-      current_user,
-      project_id: project.id,
-      commit_sha: reverting_commit.sha,
-      state: 'merged'
-    ).execute.first if reverting_commit
+    if reverting_commit
+      MergeRequestsFinder.new(
+        current_user,
+        project_id: project.id,
+        commit_sha: reverting_commit.sha,
+        state: 'merged'
+      ).execute.first
+    end
   end
 
   def merged_at

app/views/projects/merge_requests/_merge_request.html.haml

@@ -40,7 +40,7 @@
 
     .issuable-meta
       %ul.controls.d-flex.align-items-end
-        - if merge_request.is_reverted?(current_user)
+        - if merge_request.reverted_by_merge_request?(current_user)
           %li.issuable-status.d-none.d-sm-inline-block
             = _('MERGED (REVERTED)')
         - elsif merge_request.merged?

app/views/projects/merge_requests/_mr_title.html.haml

@@ -14,7 +14,7 @@
   .detail-page-header-body
     .issuable-status-box.status-box{ class: status_box_class(@merge_request) }
       = sprite_icon(state_icon_name, css_class: 'd-block d-sm-none')
-      - if @merge_request.is_reverted?(current_user)
+      - if @merge_request.reverted_by_merge_request?(current_user)
         %span.d-none.d-sm-block
           = _('Merged (%{reverted})').html_safe % { reverted: link_to('reverted', merge_request_path(@merge_request.reverting_merge_request(current_user)), class: 'gl-text-white! gl-text-decoration-underline') }
       - else