+indentation. The indent program can help you to stick to it:
+
+indent -kr -br -brs -ce -bbo --dont-break-procedure-type --no-tabs
+--cuddle-do-while --cuddle-else --indent-level2 --leave-preprocessor-space
+--no-space-after-function-call-names <myfile>
+
+FIXME: this list of arguments is still to be discussed, maybe