Do not implement specific case fixes.

app/models/dunlop/source_file_model.rb

@@ -62,7 +62,6 @@ module Dunlop::SourceFileModel
 
   def pre_process_working_file(target_path = working_file.path)
     Dunlop::FileSed.fix_line_endings(target_path)
-    Dunlop::FileSed.in_place(target_path, %Q{s/"//g})
   end
 
   def load_source_records

app/services/dunlop/file_zip.rb

@@ -3,7 +3,7 @@ module Dunlop::FileZip
   def self.unzip(zipped_filename, unzipped_filename)
     case self.mime_type(zipped_filename)
     when "application/zip"
-      if zipped_filename.end_with?('.xlsx') # .xlsx IS a zipfile
+      if zipped_filename.to_s.end_with?('.xlsx') # .xlsx IS a zipfile # .to_s is because it can be a Pathname
         %x[ cp #{zipped_filename} #{unzipped_filename} ]
       else
         %x[ unzip -p #{zipped_filename} > #{unzipped_filename} ]