diff --git a/part3intro/toolchaintechnotes.xml b/part3intro/toolchaintechnotes.xml
index 72e3ab703..3bc54842a 100644
--- a/part3intro/toolchaintechnotes.xml
+++ b/part3intro/toolchaintechnotes.xml
@@ -38,8 +38,8 @@
     <title>About Cross-Compilation</title>
 
     <para>Cross-compilation involves some concepts that deserve a section on
-    their own. Although this section may be omitted in a first reading, 
-    coming back to it later will be beneficial to your full understanding of 
+    their own. Although this section may be omitted in a first reading,
+    coming back to it later will be beneficial to your full understanding of
     the process.</para>
 
     <para>Let us first define some terms used in this context:</para>