Code/syntax highlighting and formatting

Run some heuristics to try and figure out whether a snippet is a piece of programming code, a script or similar. For example looking for hashbang or presence of given keywords, especially in a multiline snippet. Then perform syntax highlighting (basic/generic could work fine, but language/family detection and "proper" syntax highlight would be even more amazing) and formatting (use a smaller font size and wider box, monospaced, probably don't wrap lines by default)