sh/join-lines (239 bytes)
1 # Removes all newlines from the input stream, like holding J on line 1 in vi. 2 paste -sd '\0' - 3 4 # POSIX note: 5 # need the - to read from stdin on BSD 6 # posix requires '\0' "no separator". It isn't null-terminated! 7 # paste -s is the GNU way