Invoke-RestMethod doesn't return useful info when no data is returned. #5320
Description
Steps to reproduce
You will need to generate an API token and grant the notifications privilege.
PS /Users/greg> $apitoken = "yourapitoken"
PS /Users/greg> $headers = @{ Authorization = "token $apitoken" }
PS /Users/greg> $resp = Invoke-RestMethod -Uri https://api.github.com/notifications -Headers $headers
PS /Users/greg> $resp -eq $null
PS /Users/greg>What is returned is an Object.
PS /Users/greg> $resp -is [System.Object]
True
PS /Users/greg> Should be no different than this.
PS /Users/greg> $obj = New-Object System.Object
PS /Users/greg> $obj -eq $null
False
PS /Users/greg> Expected behavior
PS /Users/greg> $resp -eq $null
True
PS /Users/greg>Actual behavior
PS /Users/greg> $resp -eq $null
PS /Users/greg>Environment data
Name Value
---- -----
PSVersion 6.0.0-beta.9
PSEdition Core
GitCommitId v6.0.0-beta.9
OS Darwin 17.2.0 Darwin Kernel Version 17.2.0: Fri Sep 29 18:27:05 PDT 2017; root:xnu-4570.20.62~3/R...
Platform Unix
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0This occurs for Windows PowerShell versions too.