tests.at: Use correct `m4_bpatsubst' instead of wrong `m4_bregexp'.
[runlisp] / config /
drwxr-xr-x   ..
lrwxrwxrwx 30 auto-version -> ../.ext/cfd/build/auto-version
lrwxrwxrwx 27 confsubst -> ../.ext/cfd/build/confsubst