Typo fix

diff --git a/Doc/lib/libcollections.tex b/Doc/lib/libcollections.tex
index cea06e8b2cd2247727a552c085c4668890121cfb..d9bfa39106739c5e6cf6a4bf359aad70856b0f05 100644 (file)
--- a/Doc/lib/libcollections.tex
+++ b/Doc/lib/libcollections.tex
@@ -310,7 +310,7 @@ languages):
 
 When a letter is first encountered, it is missing from the mapping, so the
 \member{default_factory} function calls \function{int()} to supply a default
-count of zero.  The increment operation then builds of the count for each
+count of zero.  The increment operation then builds up the count for each
 letter. This technique makes counting simpler and faster than an equivalent
 technique using \method{dict.get()}: