private/FormatErrorMessage.ps1

function FormatErrorMessage
{
    [CmdletBinding()]
    param(
        [Parameter(ValueFromPipeline=$true)]
        $ErrorRecord = $Error[0]
    )

    $currentConfig = GetCurrentConfigurationOrDefault
    if ($currentConfig.verboseError) {
        $error_message = "{0}: An Error Occurred. See Error Details Below: $($script:nl)" -f (Get-Date)
        $error_message += ("-" * 70) + $script:nl
        $error_message += "Error: {0}$($script:nl)" -f (ResolveError $ErrorRecord -Short)
        $error_message += ("-" * 70) + $script:nl
        $error_message += ResolveError $ErrorRecord
        $error_message += ("-" * 70) + $script:nl
        $error_message += "Script Variables" + $script:nl
        $error_message += ("-" * 70) + $script:nl
        $error_message += get-variable -scope script | format-table | out-string
    } else {
        # ($_ | Out-String) gets error messages with source information included.
        $error_message = "Error: {0}: $($script:nl){1}" -f (Get-Date), (ResolveError $ErrorRecord -Short)
}

    $error_message
}