Repaired typo in new comment.
diff --git a/Lib/difflib.py b/Lib/difflib.py
index 347b647..3e28b18 100644
--- a/Lib/difflib.py
+++ b/Lib/difflib.py
@@ -509,7 +509,7 @@
if i1 + k1 == i2 and j1 + k1 == j2:
# Yes, so collapse them -- this just increases the length of
# the first block by the length of the second, and the first
- # block so lengthebd remains the block to compare against.
+ # block so lengthened remains the block to compare against.
k1 += k2
else:
# Not adjacent. Remember the first block (k1==0 means it's