See https://github.com/dotnet/roslyn/issues/28033

These tests were _accidentally_ testing line commit, uncovering
https://github.com/dotnet/roslyn/issues/27988

This reverts commit 7a8c4a8de5f67d5b1908a9b7ee57a954b0585c7a.

Merge master to master-vs-deps

Fix bugs related to IAnonymousObjectCreationOperation

Avoid stealing focus from the active output window pane

Rename KeyValuePair

The target framework netcoreapp2.0 includes a new type: `KeyValuePair`.
This conflicts with our `KeyValuePair` utility class and causes a lot of
friction whenever netcoreapp2.0 is added as a target framework for a
project.

Renaming the type to `KeyValuePairUtil` to remove the ambiguity.

Enable C# semantic tests on CoreClr

The syntax is incorrect and it's failing bash. Will try again later.

Make "Roslyn" default setup project

This isn't used by anything else.

Update CSharpFullyQualifyCodeFixProvider to support unbound identifier diagnostics

Simplify impl of 'prefer predefined type'

Check for invalid file paths in ContainsChildrenGraphQuery

Implement INavigateToItemProvider2 with filtering

Reduces the implicit double check for invalid characters in the path.

Fix target instance selection for integration tests run from test explorer

Enable VB symbols test on CoreClr