hgweb: fix error in docstring
Despite the subtle semantic difference, this sentence really meant to
say "overridden", not "overwritten".
--- a/mercurial/helptext/hgweb.txt Thu Dec 12 11:37:30 2019 -0500
+++ b/mercurial/helptext/hgweb.txt Thu Dec 12 11:41:28 2019 -0500
@@ -61,7 +61,7 @@
a collection of named templates. Each template is used to render a
specific piece of data, such as a changeset or diff.
-The style for the current request can be overwritten two ways. First,
+The style for the current request can be overridden two ways. First,
if ``{command}`` contains a hyphen (``-``), the text before the hyphen
defines the style. For example, ``/atom-log`` will render the ``log``
command handler with the ``atom`` style. The second way to set the