Remove spurious period.
diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index 9f23cdf..a35923f 100644
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -410,7 +410,7 @@
 
 Buffer objects are not directly supported by Python syntax, but can be
 created by calling the builtin function
-\function{buffer()}.\bifuncindex{buffer}.  They don't support
+\function{buffer()}.\bifuncindex{buffer}  They don't support
 concatenation or repetition.
 \obindex{buffer}