Add html comments in Atto source view,
Save content and then reload the editor
Verify comments were retained.
During various testing with MDL-47003 and MDL-47002, I have found that there is no reason to blanket remove HTML comments from code. In fact, the display:none workaround that is push causes problems in some browsers, including Firefox.
has a non-specific relationship to
MDL-47002Atto cleaning sometimes leaves un-closed html comments
is blocked by
MDL-47003Atto HTML cleaning is overly agressive and nonsensical
MDL-49693Atto should clean textarea before placing it in editor