fix pyspecific extensions that were broken by Sphinx's grand renaming
diff --git a/Doc/tools/sphinxext/pyspecific.py b/Doc/tools/sphinxext/pyspecific.py
index 9a8b897..22ecaa2 100644
--- a/Doc/tools/sphinxext/pyspecific.py
+++ b/Doc/tools/sphinxext/pyspecific.py
@@ -48,7 +48,7 @@
from docutils.io import StringOutput
from docutils.utils import new_document
from sphinx.builder import Builder
-from sphinx.textwriter import TextWriter
+from sphinx.writers.text import TextWriter
class PydocTopicsBuilder(Builder):
name = 'pydoc-topics'