Apply suggestions from code review

source/educators/concepts/accessibility/accessibility_guidelines.rst

@@ -6,7 +6,7 @@ What Is The Open edX® Accessibility Best Practices Guidance Based On?
 
 .. tags:: educator, concept
 
-As the Open edX® platform is strongly based on well-accepted `HTML5 markup standards <https://html.spec.whatwg.org/>`_ and `WAI-ARIA <https://www.w3.org/WAI/standards-guidelines/aria/>`_, we expect that learners who require additional accessibility tools such as screen readers and screen magnifiers will enjoy strong compatibility. We test regularly with the most popular accessibility tools.
+As the Open edX® platform is strongly based on well-accepted `HTML5 markup standards <https://html.spec.whatwg.org/>`_ and `WAI-ARIA <https://www.w3.org/WAI/standards-guidelines/aria/>`_, we expect that learners who require additional accessibility tools such as screen readers and screen magnifiers will enjoy strong compatibility.
 
 In addition, our guidance is based on principles of `universal
 design <https://en.wikipedia.org/wiki/Universal_design>`_ (usable by all, to the greatest extent possible, without the need for

source/educators/concepts/accessibility/best_practices_course_content_dev.rst

@@ -87,7 +87,7 @@ readable, and that there is sufficient contrast between the foreground and
 background. Do not use color as the sole means of visually distinguishing an
 element or conveying critical information. If you must create images that
 contain text, make sure that the text has good contrast with the background. Images of text cannot be scaled or
-color corrected as effectively as HTML text. If you choose to override platform's default font colors, make sure that the
+color corrected as effectively as HTML text. If you choose to override the platform's default font colors, make sure that the
 foreground and background colors have `sufficient contrast
 <https://contrast-ratio.com/>`_.