src/Tools/WWW_Find/ROOT.ML

use buffers instead of string concatenation

if String.isPrefix "polyml" ml_system
then 
  (use "unicode_symbols.ML";
  use "html_unicode.ML";
  use "mime.ML";
  use "http_status.ML";
  use "http_util.ML";
  use "xhtml.ML";
  use "socket_util.ML";
  use "scgi_req.ML";
  use "scgi_server.ML";
  use "echo.ML";
  use "find_theorems.ML")
else ()