cat <<EOM
-Previous version of $package used the standard IO mechanisms as defined in
-<stdio.h>. Versions 5.003_02 and later of perl allow alternate IO
+Previous version of $package used the standard IO mechanisms as defined
+in <stdio.h>. Versions 5.003_02 and later of perl allow alternate IO
mechanisms via a "PerlIO" abstraction, but the stdio mechanism is still
-the default and is the only supported mechanism. This abstraction
-layer can use AT&T's sfio (if you already have sfio installed) or
-fall back on standard IO. This PerlIO abstraction layer is
-experimental and may cause problems with some extension modules.
+the default. This abstraction layer can use AT&T's sfio (if you already
+have sfio installed) or regular stdio. Using PerlIO with sfio may cause
+problems with some extension modules. Using PerlIO with stdio is safe,
+but it is slower than plain stdio and therefore is not the default.
If this doesn't make any sense to you, just accept the default 'n'.
EOM