Clean up acknowledgements

docs/docs/acknowledgements.rst

@@ -6,11 +6,13 @@ History & Acknowledgements
 Acknowledgements
 ----------------
 
+- Dave Halter for creating and maintaining Jedi & Parso.
 - Takafumi Arakaki (@tkf) for creating a solid test environment and a lot of
   other things.
 - Danilo Bargen (@dbrgn) for general housekeeping and being a good friend :).
 - Guido van Rossum (@gvanrossum) for creating the parser generator pgen2
   (originally used in lib2to3).
+- Thanks to all the :ref:`contributors <contributors>`.
 
 A Little Bit of History
 -----------------------
@@ -59,5 +61,6 @@ auto-completion work, he said:
 
 Now that it is finished, I hope he likes it :-).
 
+.. _contributors:
 
 .. include:: ../../AUTHORS.txt