miniblog.

Further tinkering with diagnostics, following feedback! * Two lines of context above and below now. * The caret is included in the line below where possible. * Syntax highlighting of keywords. I kinda feel that smart context sizing would be better. What do you think so far?

Chekhov's repro: If a line of code is included in a bug report, it should contribute to the debugging somewhere.

Difftastic does syntax highlighting based on tree-sitter's parse of the *whole file*. It's more accurate than most diffs are able to do. In this hunk, the opening " of the string literal isn't included, but difftastic still knows that the first lines are from a string.