Fix untranslated string "OK" in repositories diff view (#39778).

git-svn-id: https://svn.redmine.org/redmine/trunk@22983 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/repositories/diff.html.erb

@@ -23,7 +23,7 @@
                :rev        => nil},
                :method     => :get) do %>
     <%= text_field_tag 'rev', @rev, :size => 8 %>
-    <%= submit_tag 'OK', :name => nil %>
+    <%= submit_tag l(:button_view), :name => nil %>
   <% end %>
 </div>
 <%= render :partial => 'changeset' %>