[docs] [issue28755] Rework syntax highlighing in howto/clinic.rst

New submission from Julien Palard: I was reading `howto/clinic.html` and though I'll fix syntax highlighting. ---------- assignee: docs@python components: Argument Clinic, Documentation messages: 281304 nosy: docs@python, larry, mdk priority: normal severity: normal status: open title: Rework syntax highlighing in howto/clinic.rst versions: Python 2.7, Python 3.6, Python 3.7 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue28755> _______________________________________