shell - How to grep a text file which contains some binary data?

Question

grep returns

Binary file test.log matches

For example

echo    "line1 re x00
line2
line3 re
" > test.log  # in zsh
echo -e "line1 re x00
line2
line3 re
" > test.log  # in bash
grep re test.log

I wish the result will show line1 and line3 (total two lines).

Is it possible to use tr convert the unprintable data into readable data, to let grep work again?

Answer 1

grep -a

It can't get simpler than that.