This is indeed an issue with `cat FILENAME`. A better code for this section would be:

```erb
files = <% if @include_files -%><%= @include_files.join(" ") + " " -%><% end -%><%= @conf_dir -%>/*<%= @conf_ext %>
```
But I'm no sure, if the ordering is correct this way. May @plathrop can decide on this case.
Nevertheless I would not include this change in the pull request and start an other with the provided code.