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Append to existing line

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# 1  
Old 12-07-2011
Append to existing line
I have a file which has lines that end with a plus (+) sign. I would like to get the next line appended to the one with the plus. For example

Code:
bla bla bla bla bla +
blip blip blip 

would become

bla bla bla bla bla blip blip blip

However not all lines end with a plus sign . I would need only those with a plus.
# 2  
Old 12-07-2011
With GNU sed:
Code:
$> cat infile
bla bla bla bla bla +
blob blob +
blip blip blip

would become

bla bla bla bla bla blip blip blip
$> sed -e :a -e '/\+$/ {N; s/\n/ /; ta}' infile
bla bla bla bla bla + blob blob + blip blip blip

would become

bla bla bla bla bla blip blip blip

This User Gave Thanks to zaxxon For This Post:
m.d.ludwig
# 3  
Old 12-07-2011
Thanks...I was close but I did not place the + sign in the right place.
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