binutils-gdb/bfd/doc/exfil3-p

# blank-line activity:
# Merge adjacent blank lines.  Loop til no change.
:blin
/^$/,/^ *[^ ]*.*$/{
/^$/N
s/^ *\n *$//
}
t blin
#
/^$/,/^ *[^ ]*.*$/{
/^$/N
# Transpose <blank line> <end comment>
/^ *\n\*\/$/c\
*\/\

}