27739 Prepare for updated avoid_classes_with_only_static_members lint (cla: yes, waiting for tree to go green, platform-web, needs tests)

27793 Improve documentation of Path.extendWithPath (cla: yes, needs tests)

27819 [fuchsia] Fix DynamicLibrary.open path on Fuchsia (cla: yes, platform-fuchsia, needs tests)

27823 [web] Update CanvasPool documentation (cla: yes, platform-web, needs tests)

27828 Fix race condition in FlutterSurfaceManager (cla: yes, waiting for tree to go green, platform-macos, needs tests)

27838 Migrate all Python hashbangs to Python 3 (cla: yes, platform-fuchsia, needs tests)

platform-ios - 45 pull request(s)