Changed # to ! on merge requests on activity view

Closes #9082

app/helpers/events_helper.rb

@@ -155,6 +155,13 @@ module EventsHelper
 
   def event_note_title_html(event)
     if event.note_target
+      link_prefix =
+        if event.note_target.class.name == "Issue"
+          "#"
+        else
+          "!"
+        end
+
       if event.note_commit?
         link_to(
           namespace_project_commit_path(event.project.namespace, event.project,
@@ -168,11 +175,11 @@ module EventsHelper
         link_to(namespace_project_snippet_path(event.project.namespace,
                                                event.project,
                                                event.note_target)) do
-          "#{event.note_target_type} ##{truncate event.note_target_id}"
+          "#{event.note_target_type} #{link_prefix}#{truncate event.note_target_id}"
         end
       else
         link_to event_note_target_path(event) do
-          "#{event.note_target_type} ##{truncate event.note_target_iid}"
+          "#{event.note_target_type} #{link_prefix}#{truncate event.note_target_iid}"
         end
       end
     else

app/views/events/event/_common.html.haml

@@ -4,7 +4,7 @@
     = event_action_name(event)
 
   - if event.target
-    %strong= link_to "##{event.target_iid}", [event.project.namespace.becomes(Namespace), event.project, event.target]
+    %strong= link_to "!#{event.target_iid}", [event.project.namespace.becomes(Namespace), event.project, event.target]
 
   = event_preposition(event)
 

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

@@ -48,7 +48,7 @@
             = note_count
 
   .merge-request-info
-    \##{merge_request.iid} ·
+    \#{merge_request.iid} ·
     opened #{time_ago_with_tooltip(merge_request.created_at, placement: 'bottom')}
     by #{link_to_member(@project, merge_request.author, avatar: false)}
     - if merge_request.target_project.default_branch != merge_request.target_branch

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

@@ -2,7 +2,7 @@
   .status-box{ class: status_box_class(@merge_request) }
     = @merge_request.state_human_name
   %span.identifier
-    Merge Request ##{@merge_request.iid}
+    Merge Request !#{@merge_request.iid}
   %span.creator
     ·
     by #{link_to_member(@project, @merge_request.author, size: 24)}