license extension rename broke links

Description

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For a defect specific to the MSTest V2 test framework, describe the issue you’ve observed.

Side effect generated by #603. Also, taking in consideration that Github support LICENSE, why add the .txt? I can open an MR, but in my opinion the problem is the file extension. Waiting for feedback.

Steps to reproduce

• Go to the License section on README.md and click on the MIT license link

Expected behavior

Open license content

Actual behavior

404

[Haplois]

Hi,

It’s not about extensionless license files. The issue you’re having is because licenseUrl is depracated. Even if we update this, you should stop using that and use the license expression included with the package itself.

[jnyrup]

Nuget seems to have problems linking to extension-less license files

Scenario: I use Get-Package | Select-Object Id,LicenseUrl to list all licenses in my projects and for MSTest.TestAdapter it prints

MSTest.TestAdapter                                              https://aka.ms/deprecateLicenseUrl

As far as I understand the license displayed on show on https://www.nuget.org/packages/MSTest.TestAdapter/ is generated upon ingestion of the nuget package where it stores the license file from <PackageLicenseFile> and generates a valid link to it.

If this is changed to

<PackageLicenseExpression>MIT</PackageLicenseExpression>

the nuget pack will include https://licenses.nuget.org/MIT in the generated .nuspec file.

Optionally use a combined approach, using <PackageLicenseExpression> and embedding the license file, see https://github.com/JamesNK/Newtonsoft.Json/blob/master/Src/Newtonsoft.Json/Newtonsoft.Json.csproj