Add top margin to the related merge requests section

app/views/projects/issues/_merge_requests.html.haml

 - if @merge_requests.any?
-  %h2.merge-requests-title
-    = pluralize(@merge_requests.count, 'Related Merge Request')
-  %ul.unstyled-list.related-merge-requests
-    - has_any_head_pipeline = @merge_requests.any?(&:head_pipeline_id)
-    - @merge_requests.each do |merge_request|
-      %li
-        %span.merge-request-ci-status
-          - if merge_request.head_pipeline
-            = render_pipeline_status(merge_request.head_pipeline)
-          - elsif has_any_head_pipeline
-            = icon('blank fw')
-        %span.merge-request-id
-          = merge_request.to_reference
-        %span.merge-request-info
-          %strong
-            = link_to merge_request.title, merge_request_path(merge_request), class: "row_title"
-          - unless @issue.project.id == merge_request.target_project.id
-            in
-            - project = merge_request.target_project
-            = link_to project.full_name, project_path(project)
+  .prepend-top-default
+    %h2.merge-requests-title
+      = pluralize(@merge_requests.count, 'Related Merge Request')
+    %ul.unstyled-list.related-merge-requests
+      - has_any_head_pipeline = @merge_requests.any?(&:head_pipeline_id)
+      - @merge_requests.each do |merge_request|
+        %li
+          %span.merge-request-ci-status
+            - if merge_request.head_pipeline
+              = render_pipeline_status(merge_request.head_pipeline)
+            - elsif has_any_head_pipeline
+              = icon('blank fw')
+          %span.merge-request-id
+            = merge_request.to_reference
+          %span.merge-request-info
+            %strong
+              = link_to merge_request.title, merge_request_path(merge_request), class: "row_title"
+            - unless @issue.project.id == merge_request.target_project.id
+              in
+              - project = merge_request.target_project
+              = link_to project.full_name, project_path(project)
 
-        - if merge_request.merged?
-          %span.merge-request-status.prepend-left-10.merged
-            Merged
-        - elsif merge_request.closed?
-          %span.merge-request-status.prepend-left-10.closed
-            Closed
-        - else
-          %span.merge-request-status.prepend-left-10.open
-            Open
+          - if merge_request.merged?
+            %span.merge-request-status.prepend-left-10.merged
+              Merged
+          - elsif merge_request.closed?
+            %span.merge-request-status.prepend-left-10.closed
+              Closed
+          - else
+            %span.merge-request-status.prepend-left-10.open
+              Open
 
-    - if @closed_by_merge_requests.present?
-      %li
-        = render partial: 'projects/issues/closed_by_box', locals: {merge_request_count: @merge_requests.count}
+      - if @closed_by_merge_requests.present?
+        %li
+          = render partial: 'projects/issues/closed_by_box', locals: {merge_request_count: @merge_requests.count}