There was no "Sorry not found" message for changesets so

/browse/changeset/123456789 would return the message "Sorry, the with
the id 123456789, could not be found.". It now says "Sorry, the
changeset with the id 123456789, could not be found."

app/views/browse/not_found.html.erb

@@ -3,6 +3,7 @@
     'node' => I18n.t('browse.not_found.type.node'),
     'way' => I18n.t('browse.not_found.type.way'),
     'relation' => I18n.t('browse.not_found.type.relation'),
+    'changeset' => I18n.t('browse.not_found.type.changeset'),
   };
 %>
 <p><%= t'browse.not_found.sorry', :type=> browse_not_found_type[@type] , :id => params[:id] %></p>

config/locales/en.yml

@@ -153,6 +153,7 @@ en:
         node: node
         way: way
         relation: relation
+        changeset: changeset
     paging_nav:
       showing_page: "Showing page"
       of: "of"

config/locales/is.yml

@@ -153,6 +153,7 @@ is:
         node: fannst ekki hnútur
         way: fannst ekki vegur
         relation: fundust ekki vensli
+        changeset: fannst ekki breytingarsett
     paging_nav:
       showing_page: "Sýni síðu"
       of: "af"