Deprecate the use of runes in SourceFile. (dart-lang/source_span#16)

This behavior runs contrary to the rest of Dart's string handling, and
in particular breaks string_scanner. See dart-lang/string_scannerdart-lang/source_span#4.
3 files changed
tree: 03c2521140b24ba7ef121360dde62cda304ff9b5
  1. pkgs/