if [ "x$alt" != "x" ]; then
test -d alt || mkdir -p alt
i="alt/${f}_$alt.nit"
ff="${ff}_$alt"
sed "s/#$alt#//g;/#!$alt#/d" "$ii" > "$i"
if [ "x$alt" != "x" ]; then
test -d alt || mkdir -p alt
i="alt/${f}_$alt.nit"
ff="${ff}_$alt"
sed "s/#$alt#//g;/#!$alt#/d" "$ii" > "$i"