Fix #2148: Error while building devhelp target with non-ASCII document.

CHANGES

@@ -7,6 +7,7 @@ Bugs fixed
 * #2012: Fix exception occurred if ``numfig_format`` is invalid
 * #2142: Provide non-minified JS code in ``sphinx/search/non-minified-js/*.js`` for
   source distribution on PyPI.
+* #2148: Error while building devhelp target with non-ASCII document.
 
 
 Release 1.3.2 (released Nov 29, 2015)

sphinx/builders/devhelp.py

@@ -91,7 +91,7 @@ class DevhelpBuilder(StandaloneHTMLBuilder):
                     write_toc(subnode, item)
             elif isinstance(node, nodes.reference):
                 parent.attrib['link'] = node['refuri']
-                parent.attrib['name'] = node.astext().encode('utf-8')
+                parent.attrib['name'] = node.astext()
 
         def istoctree(node):
             return isinstance(node, addnodes.compact_paragraph) and \
@@ -129,6 +129,6 @@ class DevhelpBuilder(StandaloneHTMLBuilder):
         # Dump the XML file
         f = comp_open(path.join(outdir, outname + '.devhelp'), 'w')
         try:
-            tree.write(f)
+            tree.write(f, 'utf-8')
         finally:
             f.close()