How would you like the output to be formatted? Are you reading the excel file directly (e.g. with Spreadsheet::ParseExcel::Simple) or are you first exporting it as a tab-separated file?

The following program works for me:

use strict;
use Spreadsheet::ParseExcel::Simple;

my $xls = Spreadsheet::ParseExcel::Simple->read('test.xls');
foreach my $sheet ( $xls->sheets ) {
    while ( $sheet->has_data ) {
        my @data = $sheet->next_row;
        foreach (@data) {
            s/\n/ /gs;
        }
        print join ', ', @data;
    } 
}
[download]

Output is:

Cell 1, Cell 2, Cell 3 Cell 4  Cell 5, Cell 6, Cell 7
[download]

Note: "Cell 3 Cell 4  Cell 5" is one block!