Before the fix Select-Object without parameters added custom 'Selected.' type to PSCustomObject even if this type was already present in TypeNames that was a memory leak in the edge case.
The cause of the problem was that Select-Object without parameters did not create a new object but forwarded the original.
The fix is to add custom 'Selected.' type only if object is original and it has not already custom 'Selected.*' type.
* Resolve issue with grouping bools & ints
We were not flushing the input buffer immediately when a different
type is encountered.
This caused some odd behaviour when piping in a mix of bools and ints.
Fix is to immediately flush the input buffer when the incoming object is
a different type than anything we have buffered.
* Remove BOM, insert newline at EOF
* Correct case of $MyInvocation special variable
* Correct case of $OFS special variable
* Correct case of $NestedPromptLevel special variable
* Correct case of $Matches special variable
* Correct case of $LASTEXITCODE special variable
* Correct case of $StackTrace special variable
* Correct case of $args special variable
* Correct case of $this special variable
* Correct case of $input special variable
* Correct case of $PSCmdlet special variable
* Correct case of $error special variable
* Correct case of $PSDefaultParameterValues special variable
* Correct case of $PSScriptRoot special variable
* Correct case of $PWD special variable
* Correct case of $null special variable
* Correct case of $true special variable
* Correct case of $false special variable
* Correct case of $PSModuleAutoLoadingPreference special variable
* Correct case of $IsLinux special variable
* Correct case of $IsMacOS special variable
* Correct case of $IsWindows special variable
* Correct case of $IsCoreCLR special variable
* Correct case of $DebugPreference special variable
* Correct case of $VerbosePreference special variable
* Correct case of $InformationPreference special variable
* Correct case of $ExecutionContext special variable
* Correct case of $HOME special variable
* Correct case of $Host special variable
* Correct case of $PID special variable
* Correct case of $PSCulture special variable
* Correct case of $PSHOME special variable
* Correct case of $PSUICulture special variable
* Correct case of $PSVersionTable special variable
* Fix false positives
