🩹 [Patch]: New Test, because a nullable string is not a thing...

[MariusStorhaug]

Describe the change

Exception             : 
    Type        : System.Management.Automation.RuntimeException
    ErrorRecord : 
        Exception             : 
            Type    : System.Management.Automation.ParentContainsErrorRecordException
            Message : Unable to find type [System.Nullable[string]]. Details: GenericArguments[0], 'System.String', on 'System.Nullable`1[T]' violates the constraint of type 'T'.
            HResult : -2146233087
        TargetObject          : System.Nullable[string]
        CategoryInfo          : InvalidOperation: (System.Nullable[string]:GenericTypeName) [], ParentContainsErrorRecordException
        FullyQualifiedErrorId : TypeNotFoundWithMessage
        InvocationInfo        : 
            ScriptLineNumber : 1
            OffsetInLine     : 2
            HistoryId        : 10
            Line             : [System.Nullable[string]] $PreviousAttemptUrl
            Statement        : System.Nullable[string]
            PositionMessage  : At line:1 char:2
                               + [System.Nullable[string]] $PreviousAttemptUrl
                               +  ~~~~~~~~~~~~~~~~~~~~~~~
            CommandOrigin    : Internal
        ScriptStackTrace      : at <ScriptBlock>, <No file>: line 1
    TargetSite  : 
        Name          : ResolveTypeName
        DeclaringType : [System.Management.Automation.TypeOps]
        MemberType    : Method
        Module        : System.Management.Automation.dll
    Message     : Unable to find type [System.Nullable[string]]. Details: GenericArguments[0], 'System.String', on 'System.Nullable`1[T]' violates the constraint of type 'T'.
    Data        : System.Collections.ListDictionaryInternal
    Source      : System.Management.Automation
    HResult     : -2146233087
    StackTrace  : 
   at System.Management.Automation.TypeOps.ResolveTypeName(ITypeName typeName, IScriptExtent errorPos)
   at System.Management.Automation.Interpreter.FuncCallInstruction`3.Run(InterpretedFrame frame)
   at System.Management.Automation.Interpreter.EnterTryCatchFinallyInstruction.Run(InterpretedFrame frame)
TargetObject          : System.Nullable[string]
CategoryInfo          : InvalidOperation: (System.Nullable[string]:GenericTypeName) [], RuntimeException
FullyQualifiedErrorId : TypeNotFoundWithMessage
InvocationInfo        : 
    ScriptLineNumber : 1
    OffsetInLine     : 2
    HistoryId        : 10
    Line             : [System.Nullable[string]] $PreviousAttemptUrl
    Statement        : System.Nullable[string]
    PositionMessage  : At line:1 char:2
                       + [System.Nullable[string]] $PreviousAttemptUrl
                       +  ~~~~~~~~~~~~~~~~~~~~~~~
    CommandOrigin    : Internal
ScriptStackTrace      : at <ScriptBlock>, <No file>: line 1