[powershell] How do I output text without a newline in PowerShell?

Unfortunately, as noted in several answers and comments, Write-Host can be dangerous and cannot be piped to other processes and Write-Output does not have the -NoNewline flag.

But those methods are the "*nix" ways to display progression, the "PowerShell" way to do that seems to be Write-Progress: it displays a bar at the top of the PowerShell window with progress information, available from PowerShell 3.0 onward, see manual for details.

# Total time to sleep
$start_sleep = 120

# Time to sleep between each notification
$sleep_iteration = 30

Write-Output ( "Sleeping {0} seconds ... " -f ($start_sleep) )
for ($i=1 ; $i -le ([int]$start_sleep/$sleep_iteration) ; $i++) {
    Start-Sleep -Seconds $sleep_iteration
    Write-Progress -CurrentOperation ("Sleep {0}s" -f ($start_sleep)) ( " {0}s ..." -f ($i*$sleep_iteration) )
}
Write-Progress -CurrentOperation ("Sleep {0}s" -f ($start_sleep)) -Completed "Done waiting for X to finish"

And to take the OP's example:

# For the file log
Write-Output "Enabling feature XYZ"

# For the operator
Write-Progress -CurrentOperation "EnablingFeatureXYZ" ( "Enabling feature XYZ ... " )

Enable-SPFeature...

# For the operator
Write-Progress -CurrentOperation "EnablingFeatureXYZ" ( "Enabling feature XYZ ... Done" )

# For the log file
Write-Output "Feature XYZ enabled"