Fix text with underscores

- day_of_week now works, previously was rendered as dayofweek with "of" being italicized
- https://github.com/trentm/python-markdown2/wiki/code-friendly

generator.py

@@ -48,7 +48,7 @@
 cur.execute('CREATE UNIQUE INDEX anchor ON searchIndex (name, type, path);')
 
 # Generate tldr pages to HTML documents
-markdowner = md.Markdown()
+markdowner = md.Markdown(extras=["code-friendly"])
 with zipfile.ZipFile(io.BytesIO(r.content), "r") as archive:
     for path in archive.namelist():
         if path.startswith(doc_pref) and path.endswith(".md"):