#!/bin/sed -nf
# A quine for GNU sed.
s:.*:   i\\\
        #!/bin/sed -nf\\\
        # A quine for GNU sed.\
        h\
        s/\\\\/\\\\\\\\/g\
        s/\&/\\\\\&/g\
        s/\:/\\\\\:/g\
        s/\\n/\\\\\\n/g\
        s/.*/s\:.*\:\&\:/\
        p\
        g\
        s/ \\{2,\\}//g\
        p:
i\
#!/bin/sed -nf\
# A quine for GNU sed.
h
s/\\/\\\\/g
s/&/\\&/g
s/:/\\:/g
s/\n/\\\n/g
s/.*/s:.*:&:/
p
g
s/ \{2,\}//g
p