…821.1 (dotnet#2211)

- Microsoft.DotNet.Arcade.Sdk - 1.0.0-beta.19421.1
- Microsoft.DotNet.GenAPI - 1.0.0-beta.19421.1
- Microsoft.DotNet.Helix.Sdk - 2.0.0-beta.19421.1

…3.0-preview9-to-release/3.0

[automated] Merge branch 'release/3.0-preview9' => 'release/3.0'

dotnet#2217)

* Update dependencies from https://github.com/dotnet/core-setup build 20190821.22

- Microsoft.NETCore.App.Ref - 3.0.0-rc1-19421-22
- NETStandard.Library.Ref - 2.1.0-rc1-19421-22
- Microsoft.NETCore.App.Runtime.win-x64 - 3.0.0-rc1-19421-22

Dependency coherency updates

- Microsoft.Win32.Registry - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.ComponentModel.Annotations - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Diagnostics.DiagnosticSource - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Diagnostics.EventLog - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.IO.Pipelines - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Reflection.Metadata - 1.7.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Runtime.CompilerServices.Unsafe - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Cryptography.Cng - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Security.Cryptography.Xml - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.ServiceProcess.ServiceController - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Text.Encodings.Web - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- System.Text.Json - 4.6.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)
- Microsoft.NETCore.Platforms - 3.0.0-rc1.19420.10 (parent: Microsoft.NETCore.App.Runtime.win-x64)

* Update dependencies from https://github.com/dotnet/roslyn build 20190822.1

- Microsoft.Net.Compilers.Toolset - 3.3.1-beta3-19422-01

…otnet#2210)

- unblocks work on dotnet/aspnetcore#4923
  - arguments for inside and outside men of service reference doc gen tool are mixed by default
  - users may add either argument type to the end of the outside man's command line
- e.g. "command --unexpected unexpectedValue --expected" can now set the "expected" option
  - only "--unexpected" and "unexpectedValue" are added to RemainingArguments in that case

- default behaviour of the command-line parser is unchanged to avoid breaking existing applications
- new switch is supported only when calling `CommandLineApplication` constructor for top-level commands
  - `dotnet-getdocument` (the outside man) has no (sub)commands and expanding scope would increase churn

nits: take VS suggestions in changed files