diff --git a/pypeg2/xmlast.py b/pypeg2/xmlast.py
index b02882f..0145a34 100644
--- a/pypeg2/xmlast.py
+++ b/pypeg2/xmlast.py
@@ -126,6 +126,7 @@ def thing2xml(thing, pretty=False, object_names=False):
             if pretty:
                 warnings.warn("lxml is needed for pretty printing",
                         ImportWarning)
+        etree.indent(tree)
         return etree.tostring(tree)
 
 
diff --git a/samples/sample2.py b/samples/sample2.py
index edd80ca..5fb1711 100644
--- a/samples/sample2.py
+++ b/samples/sample2.py
@@ -48,7 +48,7 @@ that=new one
 once=anything
 twice=goes
 [Number 3]
-...
+<BLANKLINE>
 
 pyPEG contains an XML backend, too:
 
@@ -63,14 +63,13 @@ pyPEG contains an XML backend, too:
     <Key name="once">anything</Key>
     <Key name="twice">goes</Key>
   </Section>
-  <Section name="Number 3"/>
+  <Section name="Number 3" />
 </IniFile>
-...
 
 In this sample the tree contains named objects only. Then we can output object
 names as tag names. Spaces in names will be translated into underscores.
 
->>> print(thing2xml(ini_file, pretty=True, object_names=True).decode()) # doctest: +SKIP
+>>> print(thing2xml(ini_file, pretty=True, object_names=True).decode())
 <IniFile>
   <Number_1>
     <this>something</this>
@@ -80,9 +79,8 @@ names as tag names. Spaces in names will be translated into underscores.
     <once>anything</once>
     <twice>goes</twice>
   </Number_2>
-  <Number_3/>
+  <Number_3 />
 </IniFile>
-...
 """
 
 from __future__ import unicode_literals, print_function