style: include new linter rules and fix files

test/test_question.py

@@ -46,10 +46,10 @@ def test_question_translation_html():
 @pytest.mark.latex
 def test_question_latex():
     assertions = {
-        "[question:123]": "\question{123}",
-        "\n[question:123]\n": "\question{123}",
-        "\n[question:123]\n[question:123]": "\question{123}\question{123}",
-        "Foo\n[question:123]\nBar": "\nFoo\n\question{123}\nBar\n",
+        "[question:123]": r"\question{123}",
+        "\n[question:123]\n": r"\question{123}",
+        "\n[question:123]\n[question:123]": r"\question{123}\question{123}",
+        "Foo\n[question:123]\nBar": "\nFoo\n\\question{123}\nBar\n",
     }
 
     def test_function(input):