docbook: fixed syntax error/reformat

diff --git a/treecutter/docbook.py b/treecutter/docbook.py
index ee310549c1713ae67ad73583e0e5118f7cc091fe..a6de3f6b7875c5a944394168e321cd7a4407dbd7 100644 (file)
--- a/treecutter/docbook.py
+++ b/treecutter/docbook.py
@@ -241,11 +241,14 @@ class Docbook:
     def xslt(self, transform):
         """XSLT transform"""
         transformed = transform(self._doc)
-        transformed_str = etree.tostring(transformed.getroot(),
-                                         encoding="unicode",
-                                         method="xml", doctype=None,
-                                         pretty_print=True,
-                                         xml_declaration=False))
+        transformed_str = etree.tostring(
+            transformed.getroot(),
+            encoding="unicode",
+            method="xml",
+            doctype=None,
+            pretty_print=True,
+            xml_declaration=False,
+        )
         return transformed_str
 
     def clean(self):