Enable the non-nullable experiment for dartdoc.

For Dartdoc 0.32.1 this will only impact generated docs for the 'dev'
branch -- 'edge', 'be' and other builds will still generate legacy
documentation.  This may change with future versions as the SDK
allow-list feature gets pipelined through the analyzer to dartdoc.

Depends on https://dart-review.googlesource.com/c/sdk/+/149363
(will result in undefined behavior if applied to 0.32.0 or earlier).

Change-Id: Idf7d37f5b06deec1c4e02708d24029f47a869df2
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149344
Commit-Queue: Alexander Thomas <athom@google.com>
Reviewed-by: Alexander Thomas <athom@google.com>

https://dart.googlesource.com/sdk/+/83277a4f3793271c372b649b87a80eba1d1c383b
1 file changed
tree: e8064a7a5b26a2545a313b62176c9eb89319b070
  1. commits.json