Merge to default.
diff --git a/Doc/library/html.parser.rst b/Doc/library/html.parser.rst
index 8a0416e..06a3b1a 100644
--- a/Doc/library/html.parser.rst
+++ b/Doc/library/html.parser.rst
@@ -154,7 +154,7 @@
Method called when an unrecognized SGML declaration is read by the parser.
The *data* parameter will be the entire contents of the declaration inside
- the ``<!...>`` markup. It is sometimes useful to be be overridden by a
+ the ``<!...>`` markup. It is sometimes useful to be overridden by a
derived class; the base class implementation raises an :exc:`HTMLParseError`.