# File lib/rake/application.rb, line 165
165:     def deprecate(old_usage, new_usage, call_site)
166:       return if options.ignore_deprecate
167:       $stderr.puts "WARNING: '#{old_usage}' is deprecated.  " +
168:         "Please use '#{new_usage}' instead.\n" +
169:         "    at #{call_site}"
170:     end