Fix typo. (From SF bug #853064)
diff --git a/Doc/tut/tut.tex b/Doc/tut/tut.tex
index 1c9b0bc..3e24c1f 100644
--- a/Doc/tut/tut.tex
+++ b/Doc/tut/tut.tex
@@ -2146,7 +2146,7 @@
 True
 \end{verbatim}
 
-The \function{dict()} contructor builds dictionaries directly from
+The \function{dict()} constructor builds dictionaries directly from
 lists of key-value pairs stored as tuples.  When the pairs form a
 pattern, list comprehensions can compactly specify the key-value list.