Using https://validator.w3.org/#validate_by_upload, validate and correct the errors in the provided HTML file. To access the invalid HTML file:
1. In Canvas, right-click the broken.html link and choose "Save Link As" and save the file to your computer.
2. Review the file and correct as many errors as you can before validating
a. To view the code, right-click on the file and select Edit with Notepad++ (Windows Only). OSX users should use TextWrangler to open the file.
3. Save the file after making changes.
4. Upload the file to the validation service and review any error messages that appear (disregard warnings)
a. HINT: it may be helpful to correct the first error that appears then revalidate the code - you may find that subsequent errors disappear
5. Repeat the process until the code successfully validates.