# Buggy code
def render(self, name, value, attrs=None):
    text = super(TextInput, self).render(name, value, attrs)
    return mark_safe(
        text
        + format_html(
            """\
<a href="#" onclick="return false;" class="button" id="id_{0}_regen">Regenerate</a>
<script type="text/javascript">
(function ($) {{
    $(document).ready(function () {{
        $('#id_{0}_regen').click(function () {{
            var length = 100,
                charset = "abcdefghijklnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789`~!@#$%^&*()_+-=|[]{{}};:,<>./?",
                key = "";
            for (var i = 0, n = charset.length; i < length; ++i) {{
                key += charset.charAt(Math.floor(Math.random() * n));
            }}
            $('#id_{0}').val(key);
        }});
    }});
}})(django.jQuery);
</script>
""",
            name,
        )
    )


# Traceback (TypeError)
Traceback (most recent call last):
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/core/handlers/base.py", line 156, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/core/handlers/base.py", line 154, in _get_response
response = response.render()
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/response.py", line 106, in render
self.content = self.rendered_content
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/response.py", line 83, in rendered_content
content = template.render(context, self._request)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/backends/django.py", line 61, in render
return self.template.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 171, in render
return self._render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 163, in _render
return self.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 163, in _render
return self.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 163, in _render
return self.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 163, in _render
return self.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/defaulttags.py", line 209, in render
nodelist.append(node.render_annotated(context))
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/loader_tags.py", line 188, in render
return template.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 173, in render
return self._render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 163, in _render
return self.nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/defaulttags.py", line 209, in render
nodelist.append(node.render_annotated(context))
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/defaulttags.py", line 209, in render
nodelist.append(node.render_annotated(context))
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/defaulttags.py", line 309, in render
return nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/defaulttags.py", line 309, in render
return nodelist.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 937, in render
bit = node.render_annotated(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 904, in render_annotated
return self.render(context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 993, in render
return render_value_in_context(output, context)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/template/base.py", line 972, in render_value_in_context
value = str(value)
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/utils/html.py", line 397, in <lambda>
klass.__str__ = lambda self: mark_safe(klass_str(self))
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/forms/boundfield.py", line 33, in __str__
return self.as_widget()
File "/code/dmoj-virtenv3/lib/python3.5/site-packages/django/forms/boundfield.py", line 93, in as_widget
renderer=self.form.renderer,
TypeError: render() got an unexpected keyword argument 'renderer'

# Fixed code
def render(self, name, value, attrs=None, renderer=None):
    text = super(TextInput, self).render(name, value, attrs)
    return mark_safe(
        text
        + format_html(
            """\
<a href="#" onclick="return false;" class="button" id="id_{0}_regen">Regenerate</a>
<script type="text/javascript">
(function ($) {{
    $(document).ready(function () {{
        $('#id_{0}_regen').click(function () {{
            var length = 100,
                charset = "abcdefghijklnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789`~!@#$%^&*()_+-=|[]{{}};:,<>./?",
                key = "";
            for (var i = 0, n = charset.length; i < length; ++i) {{
                key += charset.charAt(Math.floor(Math.random() * n));
            }}
            $('#id_{0}').val(key);
        }});
    }});
}})(django.jQuery);
</script>
""",
            name,
        )
    )