Don't use Rails' 'spreadsheet_link_tag' with the :cache option

[kellyredding]

If you use this option, Rails tries to do some magic and combine the stylesheets you specify into one sheet. However, it requires that the sheets you specify are already in the 'public/stylesheets' folder, and they may or may not be if you are using this gem. Rails will raise an exception saying it can't find a specified .css file and stuff breaks.

Instead, define combinations using Rack::Less.configure, and use the 'stylesheet_link_tag' as directed in the README if you want this behavior.