anchor.diff:    s.platform = Gem::Platform::RUBY
     s.files = [
       <% ###### Below is executed in ERB environment ######
  -    # Gets file list from the "git-ls-files" command.
  -    files = `git-ls-files 2>/dev/null`.to_s.split(/\r?\n/)
  +    # Gets file list from the "git ls-files" command.
  +    files = `git ls-files`.to_s.split(/\r?\n/)
       files.delete_if { |x| x.empty? }
       # When git-ls-files isn't available, creates a list from current files.
       unless $?.success? or files.size <= 0 then
  
positive.code: Gem::Specification.new do |s|
    s.name = 'bio'
    s.version = "1.2.9.9001"
  
    s.author = "BioRuby project"
    s.email = "staff@bioruby.org"
  
negative.code:               end
              end
      end
      %><%= 
      files.collect { |x| x.dump }.join(",\n    ")
         ###### Above is executed in ERB environment ######
  