Fix typo (fst --> head) in docs on implicit parameters

diff --git a/docs/users_guide/glasgow_exts.xml b/docs/users_guide/glasgow_exts.xml
index 0beed8e..96c2ce9 100644 (file)
--- a/docs/users_guide/glasgow_exts.xml
+++ b/docs/users_guide/glasgow_exts.xml
@@ -2505,7 +2505,7 @@ function that called it. For example, our <literal>sort</literal> function might
 to pick out the least value in a list:
 <programlisting>
   least   :: (?cmp :: a -> a -> Bool) => [a] -> a
-  least xs = fst (sort xs)
+  least xs = head (sort xs)
 </programlisting>
 Without lifting a finger, the <literal>?cmp</literal> parameter is
 propagated to become a parameter of <literal>least</literal> as well. With explicit