Remove Blank lines within a cell in Excel

Hi,
I have a text cell where there are many blank lines. I want to remove them and leave only one blank line where there are more than one blank line in a row.

e.g. here is the text cell:

data needed 1


data needed 2
data needed 3

data needed 4



data needed 5

I would like to get:
data needed 1

data needed 2
data needed 3

data needed 4

data needed 5


thank you,
Yuval