Index: head/math/hs-semigroups/pkg-descr
===================================================================
--- head/math/hs-semigroups/pkg-descr	(revision 444459)
+++ head/math/hs-semigroups/pkg-descr	(revision 444460)
@@ -1,8 +1,8 @@
 In mathematics, a semigroup is an algebraic structure consisting of a
 set together with an associative binary operation.  A semigroup
 generalizes a monoid in that there might not exist an identity element.
 It also (originally) generalized a group (a monoid with all inverses) to
 a type where every element did not have to have an inverse, thus the
 name semigroup.
 
-WWW: https://github.com/ekmett/semigroups/
+WWW: https://github.com/ekmett/semigroups