use fnmatch to test for case insensitive file systems

this is due to:

  https://bugs.ruby-lang.org/issues/5994

actionview/lib/action_view/template/resolver.rb

@@ -181,12 +181,10 @@ def find_templates(name, prefix, partial, details)
     def query(path, details, formats)
       query = build_query(path, details)
 
-      # deals with case-insensitive file systems.
-      sanitizer = Hash.new { |h,dir| h[dir] = Dir["#{dir}/*"] }
-
       template_paths = Dir[query].reject { |filename|
         File.directory?(filename) ||
-          !sanitizer[File.dirname(filename)].include?(filename)
+          # deals with case-insensitive file systems.
+          !File.fnmatch(query, filename, File::FNM_EXTGLOB)
       }
 
       template_paths.map { |template|