tree cfff2430958c737f296ea98d52e4060fd1d93df7
parent 58ff2d0fe04401db60ca5bc8da1d8c1f3e7ed8ad
author Robert Nystrom <rnystrom@google.com> 1598897264 +0000
committer William Hesse <whesse@google.com> 1598897264 +0000

Roll dart_style 1.3.7 into the SDK.

The main reason is that this adds better help text when run from
`dart format`. But it includes a couple of other changes and fixes:

* Don't crash when non-ASCII whitespace is trimmed.
* Split all conditional expressions (`?:`) when they are nested.
* Handle `external` and `abstract` fields and variables.

Change-Id: I59326e693bfe538013cd23b58924461f60e8e908
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/160981
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Reviewed-by: William Hesse <whesse@google.com>