Merge pull request #13505 from edx/ammar/tnl-5557

common/lib/capa/capa/capa_problem.py

common/lib/capa/capa/inputtypes.py

common/lib/capa/capa/templates/chemicalequationinput.html

common/lib/capa/capa/templates/choicegroup.html

common/lib/capa/capa/templates/choicetext.html

common/lib/capa/capa/templates/formulaequationinput.html

common/lib/capa/capa/templates/optioninput.html

common/lib/capa/capa/templates/schematicinput.html

common/lib/capa/capa/templates/textline.html

common/lib/capa/capa/tests/test_capa_problem.py

common/lib/capa/capa/tests/test_html_render.py

common/lib/capa/capa/tests/test_input_templates.py

common/lib/capa/capa/tests/test_inputtypes.py

common/lib/capa/capa/tests/test_util.py

common/lib/capa/capa/util.py