Merge pull request #3551 from projectblacklight/3550-blacklight-css-import

Fix importmap generator so it loads blacklight css using @import rath…

Author: jcoyne

lib/generators/blacklight/assets/importmap_generator.rb

@@ -49,9 +49,7 @@ def add_stylesheet
         else
           append_to_file 'app/assets/stylesheets/application.css' do
             <<~CONTENT
-              /*
-               *= require blacklight
-               */
+              @import url("blacklight.css");
               @import url(https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css);
             CONTENT
           end