Tutorial Syntax highlighting

[ptheywood]

The tutorial pages include partial code blocks to show only the relevant snippets of code.

This means that in some cases, the code blocks are not valid python (or c++/cuda?) on their own.

I.e. the following highlights the wrong segment as a string, due to the missing opening """

Only a single code block fails to parse via pygments entriely, generating a warning and is not highligted.

Additionally, (in my opinion) the elipses indicating there is more code above below are unclear, and combined with snippets with mismatched braces aren't the easiest to read/follow in isolation