Post History

To answer the question of what the behavior is: in a dev environment, I created a post with two code blocks, one containing spaces and one containing tabs.  I couldn't just type the tabs into the post editor because the browser intercepted the tab and treated it as "move to next field".  I created test samples in both emacs and TextEdit and pasted those into the editor to see what would happen.

In both cases, there is no obvious difference in the rendering -- a 4-stop tab looks the same as 4 spaces.  *However*, if you try to select the space, in the first case you can select individual spaces but in the second case you can only select the tabbed block of spaces.  This tells me that the tab was preserved by the post editor.  We're using a library for syntax highlighting, I believe `highlight.js`.  I don't know enough about that to know if the library supports some way to make tabs visible as tabs, but I'm leaving this partial answer in case someone else can build on what I've found.