lib/roadie/errors.rb in roadie-3.5.1 vs lib/roadie/errors.rb in roadie-4.0.0

@@ -1,5 +1,7 @@
+# frozen_string_literal: true
+
 module Roadie
   # Base class for all Roadie errors. Rescue this if you want to catch errors
   # from Roadie.
   #
   # If Roadie raises an error that does not inherit this class, please report
@@ -56,11 +58,11 @@
 
     private
     # Redundant method argument is to keep API compatability without major version bump.
     # TODO: Remove argument on version 4.0.
     def build_message(extra_message = @extra_message)
-      message = %(Could not find stylesheet "#{css_name}")
+      message = +%(Could not find stylesheet "#{css_name}")
       message << ": #{extra_message}" if extra_message
       message << "\nUsed provider:\n#{provider}" if provider
       message
     end
   end
@@ -73,10 +75,10 @@
       super(css_name, "All providers failed", provider_list)
     end
 
     private
     def build_message(extra_message)
-      message = %(Could not find stylesheet "#{css_name}": #{extra_message}\nUsed providers:\n)
+      message = +%(Could not find stylesheet "#{css_name}": #{extra_message}\nUsed providers:\n)
       each_error_row(errors) do |row|
         message << "\t" << row << "\n"
       end
       message
     end