Since integrating our repos, there have been a number of changes in PRs that touch the encoding of the file, adding or removing a BOM as the editor in question decides. I've standardized on UTF-8 with BOM, as we do in roslyn, and put it in the .gitattributes so it should hopefully stay consistent.
Changes:
* Update to latest core-setup dependencies (generated using https://github.com/aspnet/AspNetCore-Internal/pull/1830)
* Add a step which asserts that version.props and versions.details.xml are in sync
* Add PR check which ensures solution files are not broken