Improve the formatting of descriptions of Types

[logiclrd]

This PR adds a new type TypeDescriptionUtility that includes some logic to improve the readability where type names are being included in test output. In particular, LINQ result sets are identified and made human-readable. This functionality was originally written for #1812 but was extracted to its own independent PR -- as such this functionality is initially used directly in DataTableCollection, DataColumnCollection and DataRowCollection assertions. It has also been applied to formatting of the type name in TypeSelectorAssertions. The new functionality is unit-tested, and releases.md has been updated to describe the change.

IMPORTANT

• The code complies with the Coding Guidelines for C#.
• The changes are covered by unit tests which follow the Arrange-Act-Assert syntax and the naming conventions such as is used in these tests.
• If the PR adds a feature or fixes a bug, please update the release notes with a functional description that explains what the change means to consumers of this library, which are published on the website.
• If the PR changes the public API the changes needs to be included by running AcceptApiChanges.ps1 or AcceptApiChanges.sh.
• If the PR affects the documentation, please include your changes in this pull request so the documentation will appear on the website.

[dennisdoomen]

I think we discussed converting your solution into an IValueFormatter that knows how to render an instance of Type.

[logiclrd]

Oh? But that assumes that any time someone wants to format a Type, they want a verbose human-readable description of it. Is that a safe assumption?

[dennisdoomen]

I'd love to see what that looks like.

[Corniel]

Consider adopting this extension method:

So:

typeof(int).ToCSharpString().Should().Be("int");
typeof(int[,,]).ToCSharpString().Should().Be("int[,,]");
typeof(Namespace.MyType).ToCSharpString().Should().Be("Namespace.MyType");
typeof(Dictionary<object, List<int?>>[])).ToCSharpString().Should().Be("Dictionary<object, List<int?>>[])");

// etc...

See the specs.

[dennisdoomen]

Closing because of a lack of progress