- Already had a good variety of integration tests so refactored the service to properly unit test each piece.
- Found several pieces of unneeded code (wasn't being used) so removed it.
- Removed the `LocateOwner` logic that was embedded in the service. We already have an equivalent locate owner on our `SyntaxTreeNode` items.
#1698
- Removed indentation service extensions and made `GetDesiredIndentation` understand `ITextSnapshot`s and `ITextLineSnapshot`.
- Updated our test `StringTextSnapshot` implementation to have the required features our indentation tests require.
- Updated indentation service tests to use new API.
#1762