aspnet/Docs 23 merged

• Fix a typo Sep 20
• Use xref link Sep 20
• Update sample2.xml Sep 18
• Fix typo Sep 18
• minor tweaks Sep 17
• Add missing * Sep 13
• Fix title Sep 13
• Remove references to retired Facebook birthday app Sep 13
• Add a space Sep 13
• Change the name of Microsoft's auth package Sep 7
• Call `UseMvc()` instead of `UseMvcWithDefaultRoute()` Sep 5
• Add a note about missing `using` statement Sep 5
• Update cu-final sample to use `nameof` Sep 3
• Add a missing closing tag `<\a>` Sep 3
• Minor tweaks Sep 3
• Add a missing slash after folder name Sep 3
• Minor tweak in ef-mvc tutorial Sep 3
• Fix views' folder name: Department -> Departments Sep 3
• Highlight modified code Sep 2
• Remove redundant word Sep 2
• Fix controller's filename in ef-mvc tutorial Sep 2
• Remove extra instruction in ef-mvc tutorial Sep 2
• Add a comma for better readability Sep 2

dotnet/docs 2 merged

• Fix typo Sep 9
• Remove extra ) Sep 9

aspnet/EntityFramework.Docs 1 open

• Update new-db.md Sep 10