Bad white-space formatting of presented source-code that uses tabs

[rjgotten]

Don't want to go into the whole religious debate of spaces vs tabs, but some people do use tabs for their scss source code, and currently that causes the presentation of said source code that is included in an item's header section, to come out wrong.

I think the code_block macro defined in utility.macros.njk can do a bit more work to accommodate the tabs-crowd in producing properly formatted source presentation, by consistently converting tabs to two spaces.

Could be as simple as using the replace filter when rendering the content property, i.e. ,

{{ content|replace("\t", "  ")|escape|safe }}