Is there a way to examine the contents of a NuGet package to see what changes it will be making? There is no option for this on the Nuget.exe command line and I do not find any information about this in the NuGet docs.
.nupkg files are just ZIP files with some metadata, so you can have a look at the contents. The NuGet Package Explorer should make it a little easier to view the contents.
The NuGet Gallery (e.g. https://www.nuget.org/) has a "Download" link on the right hand side, otherwise just install the package into an empty project and then take a peek.