1.1 --- a/new-words.py	Thu Nov 03 16:10:58 2011 +0100
     1.2 +++ b/new-words.py	Fri Nov 04 11:27:21 2011 +0100
     1.3 @@ -693,8 +693,9 @@
     1.4          lines_after = lines
     1.5          deleted_words = []
     1.6  
     1.7 +        lines_after_set = set(lines_after)
     1.8          for line in lines_before:
     1.9 -            if line not in lines_after:
    1.10 +            if line not in lines_after_set:
    1.11                  line = line.strip()
    1.12                  if ' ' in line:
    1.13                      word = re.split('\s+', line, 1)[1]