better mentioned but not closing message and icon

app/helpers/merge_requests_helper.rb

@@ -63,13 +63,6 @@ module MergeRequestsHelper
     @mr_issues_mentioned_but_not_closing ||= @merge_request.issues_mentioned_but_not_closing
   end
 
-  def mr_issues_mentioned_but_not_closing_message
-    verb = mr_issues_mentioned_but_not_closing.size > 1 ? 'are' : 'is'
-    issue_text = 'issue'.pluralize(mr_issues_mentioned_but_not_closing.size)
-
-    "The following #{issue_text} #{verb} mentioned but not being closed:"
-  end
-
   def mr_change_branches_path(merge_request)
     new_namespace_project_merge_request_path(
       @project.namespace, @project,

app/views/projects/merge_requests/widget/_open.html.haml

@@ -33,8 +33,8 @@
   - if mr_issues_mentioned_but_not_closing.present?
     .mr-widget-footer
       %span
-        %i.fa.fa-warning
-        = mr_issues_mentioned_but_not_closing_message
+        %i.fa.fa-info-circle
+        #{"Issue".pluralize(mr_issues_mentioned_but_not_closing.size)} mentioned but not being closed:
         = succeed '.' do
           != markdown issues_sentence(mr_issues_mentioned_but_not_closing), pipeline: :gfm, author: @merge_request.author
         = mr_assign_issues_link