Reflow comments to 80 characters (dart-lang/stack_trace#59)

- Find comment lines longer than 80 characters and reflow to under than
  80 characters. Leave URLs as is.
- Remove some noise words "string representation" from a doc comment -
  the signature tells us it is a `String`.
- Add some blank lines to reformat a doc comment. Indent example stack
  traces lines like a code block.
- Remove the noise word "correctly" from a test case so it fits under 80
  characters.
- Remove an unnecessary trailing whitespace.
3 files changed
tree: 46e41c5891cea6bb360a8c50e1ec7a0a38af50b3
  1. pkgs/