#print
Now suppose we wanted to delete the blanks
after the letter "t" in this line:

here are a lot         of blanks

This line is on file "blank".  Try the sequence

ed blank
1p
s/t */t/p
w
q
ready
#create Ref
here are a lotof blanks
#create blank
here are a lot         of blanks
#user
#cmp blank Ref
#log
#next
35.2c 5