or
Caleb
Most Markdown code block syntax highlighters have pretty good support for TeX based languages out of the box. I think it's reasonable to assume blocks otherwise unmarked on this site are going to be tex.

Source:

~~~markdown
```
\textbf{bob}
```
~~~

Output:

```
\textbf{bob}
```

Of course setting the language should also work:


Source:

~~~markdown
```tex
\textbf{bob}
```
~~~

Output:

```tex
\textbf{bob}
```

Right not it appears the language is just not recognized.
Top Answer
Jack Douglas
We've added TeX to our highlightjs highlighting library  as it [isn't in the list](https://highlightjs.org/download/) for a default download.

We've also made `tex` the default language for this community but please bear in mind that is you want unformatted code blocks you now need to declare that explicitly, so:

~~~none
```
\textbf{bob}
```
~~~

produces:

```
\textbf{bob}
```

and:

~~~none
```none
\textbf{bob}
```
~~~

produces: 

```none
\textbf{bob}
```
How can we enable TeX syntax highlighting as the default?
Caleb
...and I dislike it using **bold** so aggressively for all commands. I prefer subtle color based highlighting not having my code thrown  in my face ;-)
Caleb
Ya that needs some help. I maybe _could_ do it, but don't really have the time and won't for a while. I'm sure somebody will dig in eventually. It's better than nothing though, just a bit rudimentary.
Jack Douglas
I guess that might also make a good meta question…
Jack Douglas replying to Caleb
not sure how easy that would be to fix, but this is the place to do it if you have the skills: https://github.com/highlightjs/highlight.js/blob/master/src/languages/tex.js
Caleb
At least the _idea_ is good. The actual syntax support level seems to be pretty terrible, but that's another issue.
Caleb
@Jack Awesome, that sounds reasonable.