The .KEEP command allows you to keep blank lines that are present
    in the input file, in the output file when .NO FILL is in effect.
    Normally, multiple blank lines in the input file are discarded
    in the output file while .NO FILL is in effect. .NO KEEP also
    discards blank lines when .NO FILL is in effect. (See also
    .LITERAL.)

    Formats

      .KEEP

      .NO KEEP

    Abreviated formats

      .K

      .NK