sponge -V (return code: -15)
sponge: invalid option -- '-'
sponge: invalid option -- 'v'
sponge: invalid option -- 'e'
sponge: invalid option -- 'r'
sponge: invalid option -- 's'
sponge: invalid option -- 'i'
sponge: invalid option -- 'o'
sponge: invalid option -- 'n'
sponge --help (return code: 0)
sponge: invalid option -- '-'
sponge [-a] <file>: soak up all input from stdin and write it to <file>