"Sass" syntax highlighting in code block does not highlight

Issue Summary

When viewing a code block that contains Sass or SCSS code, the code is not highlighted after selecting the "Sass" option from the dropdown and publishing the page.

Steps to Reproduce

1. Edit a page
2. Add a code block
3. Select "Sass" from the language dropdown
4. Insert the following Sass or SCSS code:

   /* Sass example */
   /* This CSS will print because %message-shared is extended. */
   %message-shared
     border: 1px solid #ccc
     padding: 10px
     color: #333
   
   
   // This CSS won't print because %equal-heights is never extended.
   %equal-heights
     display: flex
     flex-wrap: wrap
   
   
   .message
     @extend %message-shared 

   /* SCSS example */
   /* This CSS will print because %message-shared is extended. */
   %message-shared {
     border: 1px solid #ccc;
     padding: 10px;
     color: #333;
   }
   
   // This CSS won't print because %equal-heights is never extended.
   %equal-heights {
     display: flex;
     flex-wrap: wrap;
   }
   
   .message {
     @extend %message-shared;
   }

1. Publish the page

Expected Results

Published page shows syntax-highlighted code block

Actual Results

Published page shows a code block with no syntax highlighting

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available