Merge branch 'prettier-html' into 'master'

__tests__/files/outlook-outlook/chrome/04/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/04/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/05/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/05/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/06/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/06/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/07/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/07/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/08/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/08/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/09/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/09/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/10/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/10/s_htmlContent.html

__tests__/files/outlook-outlook/chrome/20/r_htmlContent.html

__tests__/files/outlook-outlook/chrome/20/s_htmlContent.html

...files/outlook-outlook/chrome/20forward/r_htmlContent.html

...files/outlook-outlook/chrome/20forward/s_htmlContent.html

..._/files/outlook-outlook/chrome/20reply/r_htmlContent.html

..._/files/outlook-outlook/chrome/20reply/s_htmlContent.html