diff --git a/chapters/functions.tex b/chapters/functions.tex
index d2c080762..ac78e62ba 100644
--- a/chapters/functions.tex
+++ b/chapters/functions.tex
@@ -2145,7 +2145,7 @@ \subsection{Annotations for External Libraries and Include Files}\label{annotati
     y = ExternalFunc1_ext(x)
       annotation(Library = "ExternalLib1",
                  Include = "#include \"ExternalFunc1.h\"",
-                 SourceDirectory = 
+                 SourceDirectory =
                   "modelica://ExternalFunctions/Resources/Source");
       // The SourceDirectory is the default and thus redunant.
   end ExternalFunc1;
@@ -2190,7 +2190,7 @@ \subsection{Annotations for External Libraries and Include Files}\label{annotati
     Source // Sources for library
       Func1.c         // C source for ExternalLib1.lib
       Func2.c         // C source for ExternalLib2.lib
-      HelperFunc.c    // C source also included in ExternalLib2.lib 
+      HelperFunc.c    // C source also included in ExternalLib2.lib
 MyExternalFunctions
    package.mo
 \end{lstlisting}