--- a/eric6/DocumentationTools/QtHelpGenerator.py	Fri Apr 02 11:59:41 2021 +0200
+++ b/eric6/DocumentationTools/QtHelpGenerator.py	Sat May 01 14:27:20 2021 +0200
@@ -55,7 +55,7 @@
 HelpCollectionFile = 'collection.qhc'
 
 
-class QtHelpGenerator(object):
+class QtHelpGenerator:
     """
     Class implementing the QtHelp generator for the builtin documentation
     generator.
@@ -175,8 +175,7 @@
             joinext("index", ".html") or
             joinext("index-{0}".format(package), ".html"))
         for subpack in sorted(self.packages[package]["subpackages"]):
-            s += self.__generateSections(subpack, level + 1)
-            s += '\n'
+            s += self.__generateSections(subpack, level + 1) + '\n'
         for mod in sorted(self.packages[package]["modules"]):
             s += indent1 + '<section title="{0}" ref="{1}" />\n'.format(
                 mod, joinext(mod, ".html"))
@@ -220,7 +219,7 @@
             if not basename.endswith("."):
                 basename = "{0}.".format(basename)
         
-        sections = self.__generateSections("00index", 3)
+        sections = self.__generateSections("00index", level=3)
         filesList = sorted(e for e in os.listdir(self.htmlDir)
                            if e.endswith('.html'))
         files = "\n".join(