diff --git a/Kernel_23/doc_tex/Kernel_23_ref/Kernel.tex b/Kernel_23/doc_tex/Kernel_23_ref/Kernel.tex
index f95c0eacd66..beffdcb6152 100644
--- a/Kernel_23/doc_tex/Kernel_23_ref/Kernel.tex
+++ b/Kernel_23/doc_tex/Kernel_23_ref/Kernel.tex
@@ -1,18 +1,18 @@
 \begin{ccRefConcept}{Kernel}
 The concept of a {\em kernel} is defined by a set of requirements on
-the provision of certain types and access member functions to create 
+the provision of certain types and access member functions to create
 objects of these types. The types are function object classes to be used
-within the algorithms and data structures in the basic library of \cgal. 
-This allows you to use any model of a kernel as a traits class in 
-the \cgal\ algorithms and data structures, unless they require types 
-beyond those provided by a kernel. 
+within the algorithms and data structures of \cgal.
+This allows you to use any model of a kernel as a traits class in
+the \cgal\ algorithms and data structures, unless they require types
+beyond those provided by a kernel.
 
 %A kernel subsumes the concepts of {\em two-dimensional kernel},
 %{\em three-dimensional kernel}, and {\em $d$-dimensional kernel}.
 
-A kernel provides types, construction objects, and generalized predicates. 
-The former replace constructors of the kernel classes and constructive 
-procedures in the kernel. There are also function objects replacing operators, 
+A kernel provides types, construction objects, and generalized predicates.
+The former replace constructors of the kernel classes and constructive
+procedures in the kernel. There are also function objects replacing operators,
 especially for equality testing.
 
 \ccHasModels
@@ -536,4 +536,4 @@ example, for the function object
 
 \ccc{Kernel_d}
 
-\end{ccRefConcept} 
+\end{ccRefConcept}