the following seems to be a correct fix for
http://qa.mandriva.com/show_bug.cgi?id=27417
(ie when the last line of .spec is a macro which expands to a multi-line string)

step by step patch for rpm.org HEAD:
(it is easy to adapt to rpm5.org)




and here is a patch doing this for rpm 4.4.2.2
(and applied in mandriva's rpm)