Removing trailing whitespace - #2725

…sd1 files

The followning command was used:
```
using namespace System.Text.RegularExpressions

function Remove-TrailingWhitespace {
    param(
        [Parameter(Mandatory, ValueFromPipelineByPropertyName, ValueFromPipeline)]
        [Alias('PSPath')]
        [string] $LiteralPath
    )
    begin {
        $trailingWhiteSpace  = [Regex]::new('(?m)[ \t]+\r?$', [RegexOptions]::Compiled)
    }

    process {
        try {
            $LiteralPath = (Resolve-Path $LiteralPath).ProviderPath
            if (Test-path -PathType Leaf $LiteralPath) {
                $content = Get-Content -Raw -LiteralPath $LiteralPath
                if ($null -ne $content) {
                    $trimmedContent = $trailingWhiteSpace.Replace($content, "`r")
                    if ($trimmedContent -ne $content) {
                        # Set-Content fails for some reason with 'Set-Content : Stream was not readable.'
                        [io.file]::WriteAllText($LiteralPath, $trimmedContent, [Text.Encoding]::ASCII)
                        Get-Item $LiteralPath
                    }
                }
            }
        }
        catch {
            Write-Error -Message $_.Exception.Message -TargetObject $LiteralPath
        }
    }
}
```