If you only have to view it, I've used this:
print cast(dbo.f_functiondeliveringbigformattedtext(seed) as text)
The end result is that I get line feeds and all the content in the messages window of SMSS. Of course, it only allows for a single cell - if you want to do a single cell from a number of rows, you could do this:
declare @T varchar(max)=''
select @T=@T
+ isnull(dbo.f_functiondeliveringbigformattedtext(x.a),'NOTHINGFOUND!')
+ replicate(char(13),4)
from x -- table containing multiple rows and a value in column a
print @T
I use this to validate JSON strings generated by SQL code. Too hard to read otherwise!