#cat a.txt
aaaaa bbbbb ccccc

#printf "ddddd " >> a.txt
#cat a.txt
aaaaa bbbbb ccccc
ddddd
#printf "eeeee " >> a.txt
#printf "fffff " >> a.txt
#printf "ggggg " >> a.txt
#cat a.txt
aaaaa bbbbb ccccc
ddddd eeeee fffff ggggg


なんで1回目の追記のときだけ改行が入っちゃうの? 👀
Rock54: Caution(BBR-MD5:0be15ced7fbdb9fdb4d0ce1929c1b82f)