- `ScriptTagHelper`, `LinkTagHelper` and `ImageTagHelper` now default to using `output.Attributes["href|src"]` if it's present when they run. This enables other `TagHelper`s to run prior and add those attributes.
- Added unit tests to validate this behavior.
- Updated `ImageTagHelper` functional test resources. Now that we're always defaulting to `output.Attributes["src"]` for `ImageTagHelper.Src` we're properly copying attributes back into the `output.Attributes` collection in the correct order (isntead of appending to the end).
#2902
c3e2e6fa0a