The current devguide recommendations reads:

backquotes: ``text`` for code samples, variables, and literals.

Earlier, I've been corrected to use double backticks when marking up literals. Example PR remark:

• gh-92780: Improve sqlite3.Connection.create_collation docs cpython#92790 (comment)

Recently, I've seen other styles enforced:

• gh-85453: Adapt datetime.rst to devguide recommendations for code snippets and variables cpython#118068 (comment)

Perhaps we need a clarification, possibly with good/bad examples?