Answer checks should offer feedback to assistive tech. This commit adds

CHANGELOG.rst

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/codeinput.html

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

common/lib/capa/capa/templates/matlabinput.html

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

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

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/xmodule/xmodule/css/sequence/display.scss

common/lib/xmodule/xmodule/js/spec/capa/display_spec.coffee

common/lib/xmodule/xmodule/js/src/capa/display.coffee

common/lib/xmodule/xmodule/js/src/sequence/display.coffee

common/static/js/src/accessibility_tools.js

lms/djangoapps/courseware/features/problems.feature

lms/djangoapps/courseware/tests/test_masquerade.py