3 files changed, 6 insertions, 6 deletions
diff --git a/chapter05/gcc-pass2.xml b/chapter05/gcc-pass2.xml
index 98fd8b9ad..5a41c879d 100644
--- a/chapter05/gcc-pass2.xml
+++ b/chapter05/gcc-pass2.xml
@@ -205,8 +205,8 @@ cd ../gcc-build</userinput></screen>
         <term><parameter>--disable-bootstrap</parameter></term>
         <listitem>
           <para>Bootstrapping the compiler is now the default for GCC. However,
-	  our build method should provide us with a solid compiler without the
-	  need to bootstrap each time.</para>
+          our build method should provide us with a solid compiler without the
+          need to bootstrap each time.</para>
         </listitem>
       </varlistentry>
 
diff --git a/chapter05/perl.xml b/chapter05/perl.xml
index 1b00465b3..7483b65ef 100644
--- a/chapter05/perl.xml
+++ b/chapter05/perl.xml
@@ -44,7 +44,7 @@
     <title>Installation of Perl</title>
 
     <para>First apply a series of patches to address security issues and adapt some 
-		hard-wired paths to the C library by applying the following patch:</para>
+    hard-wired paths to the C library by applying the following patch:</para>
 
 <screen><userinput remap="pre">patch -Np1 -i ../&perl-consolidated-patch;</userinput></screen>
 
diff --git a/chapter05/tcl.xml b/chapter05/tcl.xml
index a907bb08c..8e5146d08 100644
--- a/chapter05/tcl.xml
+++ b/chapter05/tcl.xml
@@ -57,9 +57,9 @@
 
 <screen><userinput remap="make">make</userinput></screen>
 
-		<para>Compilation is now complete. As discussed earlier, running the test
-		suite is not mandatory for the temporary tools here in this chapter. To run
-		the Tcl test suite anyway, issue the following command:</para>
+    <para>Compilation is now complete. As discussed earlier, running the test
+    suite is not mandatory for the temporary tools here in this chapter. To run
+    the Tcl test suite anyway, issue the following command:</para>
 
 <screen><userinput remap="test">TZ=UTC make test</userinput></screen>