Merge pull request #984 from psibi/add-hayoo

Add hayoo choice as part of hoogle url.

Author: gracjan

haskell-hoogle.el

@@ -45,6 +45,7 @@ If nil, use the Hoogle web-site."
   :type '(choice
           (const :tag "haskell-org" "http://haskell.org/hoogle/?q=%s")
           (const :tag "fp-complete" "https://www.stackage.org/lts/hoogle?q=%s")
+          (const :tag "hayoo" "http://hayoo.fh-wedel.de/?query=%s")
           string))
 
 ;;;###autoload