diff -ur sphinxcontrib-httpdomain-1.1.7.orig/sphinxcontrib/httpdomain.py sphinxcontrib-httpdomain-1.1.7/sphinxcontrib/httpdomain.py
--- sphinxcontrib-httpdomain-1.1.7.orig/sphinxcontrib/httpdomain.py	2012-03-28 16:10:58.000000000 +1000
+++ sphinxcontrib-httpdomain-1.1.7/sphinxcontrib/httpdomain.py	2013-03-04 13:20:09.941831182 +1000
@@ -44,7 +44,7 @@
         location of the RFC which defines some HTTP method.
 
         """
-        return '{}#{}{}'.format(self.base_url, self.anchor, self.section)
+        return '%s#%s%s' % (self.base_url, self.anchor, self.section)
 
 
 #: The URL of the HTTP/1.1 RFC which defines the HTTP methods OPTIONS, GET,
@@ -319,7 +319,7 @@
         for prefix in self.ignore:
             if letters[:len(prefix)] == prefix:
                 return '/' + '/'.join(letters[:len(prefix) + 1])
-        return '/%s' % (letters[0] if letters else '',)
+        return '/%s' % (letters and letters[0] or '',)
 
     def generate(self, docnames=None):
         content = {}