Update freebook.pillar

Author: Ducasse

freebook.pillar

@@ -12,7 +12,6 @@ ESUG sponsors book writing and publishing.
 In general we strongly favor open-access books on open-source Smalltalks.
 
 - The Pharo open-access books available at *https://books.pharo.org* have been sponsored.
-
 - ESUG sponsored Squeak by Example (*http://www.squeakbyexample.org*) 
 - Andres Valloud Books (Hashing in Smalltalk: theory and practice / A mentoring cours on Smalltalk) at ESUG 2009.