Contact address is now displayed only when present

app/views/events/show.html.haml

@@ -103,12 +103,13 @@
     %em.fa.fa-external-link-alt
     %span.label= Event.human_attribute_name :url
     = link_to @event.url, sanitize(@event.url)
-%p
-  %em.fa.fa-envelope
-  %span.label= Event.human_attribute_name :contact
-  = mail_to @event.contact, nil,
-    encode: (request.format == 'text/html' ? :javascript : nil),
-    replace_at: ' CHEZ ', replace_dot: ' POINT '
+- if @event.contact.present?
+  %p
+    %em.fa.fa-envelope
+    %span.label= Event.human_attribute_name :contact
+    = mail_to @event.contact, nil,
+      encode: (request.format == 'text/html' ? :javascript : nil),
+      replace_at: ' CHEZ ', replace_dot: ' POINT '
 
 - if @event.tags && @event.tags.present?
   %p.tags

app/views/events/show.text.haml

@@ -8,8 +8,8 @@
 != display_attr @event, :region, @event.region
 != display_attr @event, :locality, t("attributes.locality_#{@event.locality}")
 != display_attr @event, :url
-!= display_attr @event, :contact
-!= display_attr @event, :submitter
+- if @event.contact.present?
+  != display_attr @event, :contact
 != display_attr @event, :tag_list, @event.tag_list
 - if @event.repeat > 0
   = display_attr @event, :repeat