Copy Lines command

    Purpose:  Copies the lines in the specified range to the line number
              specified by the third parameter. The new data is placed
              ahead of the line that was specified in the third parameter.
              This third parameter is not optional. The operation is re-
              peated the number of times specified in count.

    Format:   [line],[line],line[,count]C

    Remarks:  The parameter count defaults to 1. To repeat text, specify
              the number of times the operation is to be performed in
              count. If the first parameter or the second parameter is
              omitted, the default is the current line. This effectively
              copies the current line to the specified line. The file is
              renumbered accordingly. The first of the copied lines becomes
              the current line. For example:

              1,5,8C

              copies lines 1 through 5 to line 8. Line 8 becomes the current
              line.

              The line numbers may not overlap, or an error is reported.
              Also, the characters - and + are not allowed in the count
              field.