removing new line in a text cell ?

[Patrick Begou <Patrick Begou hmg inpg fr>]

I am working with gnumeric on a big excel file sended by a friend.
There is a column containing cells with a long text and this text 
contains new line caracters. Exporting this file in text format (for 
automatic parsing in shell and building html files) hangs as it works on 
lines and, because of these new line caracters in one cell, a gnumeric 
line is broken in an unknown number of lines.

I would like to remove these new line caracter (or replace them by 
"<BR>") in the text cell but I didn't success at this time. Replacing \n 
is not the solution...

Any idea ?

Thanks

Patrick
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