tree 230228430d035d18bac80e9be29ac46018ae9fad
parent 8dcacc47938685557144e41cc27808679e3f3c7f
author Natalie Weizenbaum <nweiz@google.com> 1545345268 -0800
committer Natalie Weizenbaum <nweiz@google.com> 1545345268 -0800

Improve span highlighting

* Fully highlights multiline spans.
* Includes line numbers.
* Uses Unicode glyphs for highlighting when available.
* Includes context after the last line of the span for a
  manually-constructed SourceSpanWithContext.

This draws heavy inspiration from Rust's multiline error highlighting.