doc/readme.indent

   1 If you want to indent this source file, in order to convert
   2 the source tree to the used programming style, you should use
   3 `make indent' in the base directory.
   4
   5 For this to work you need to have `indent' version 2.1.0 or higher
   6 in your PATH.  GNU indent 2.1.0 is available from all GNU sites,
   7 its main ftp site is ftp://ftp.gnu.org/indent/.  Or you can download
   8 it directly from the webpage of its maintainer at
   9 http://www.xs4all.nl/~carlo17/indent/