https://www.gnu.org/savannah-checkouts/gnu/autoconf/manual/autoconf-2.72/autoconf.html#index-AC_005fPREREQ-1
---
 libctf/configure.ac            | 2 +-
 readline/readline/configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)