Indent Test-MailPolicy's IP version checks.

This commit adds a tiny new feature.  When `Test-IPVersions` is run
from `Test-MailPolicy`, the output lines will be indented for clarity.
This makes use of a hidden parameter to control indentation.

When `Test-IPVersions` is invoked directly, the output will not be
modified from how it appeared in previous versions.

CHANGELOG.md

@@ -1,6 +1,7 @@
 # MailPolicyExplainer Change Log
 
 ## Version 1.3.1 (Wednesday, December 9, 2023)
+- **NEW** The IP version checks are now displayed with an indentation when run as a part of `Test-MailPolicy`.
 - **FIX** The DMARC `fo` token is now parsed correctly when multiple values are present.
 - **FIX** The DMARC `rf` token is now parsed correctly.
 

MailPolicyExplainer.psd1

@@ -167,9 +167,10 @@ PrivateData = @{
 		IconUri = 'https://raw.githubusercontent.com/rhymeswithmogul/MailPolicyExplainer/main/icon/PSGallery.png'
 
 		# ReleaseNotes of this module
-		ReleaseNotes = 'This release fixes many bugs:
+		ReleaseNotes = 'This release fixes many bugs and offers minor enhancements:
 - The DMARC `fo` token is now parsed correctly when multiple values are present.
-- The DMARC `rf` token is now parsed correctly.'
+- The DMARC `rf` token is now parsed correctly.
+- IP version checks are now indented when run from `Test-MailPolicy`.'
 
 	} # End of PSData hashtable
 

src/MailPolicyExplainer.psm1

@@ -169,21 +169,29 @@ Function Test-IPVersions
 	Param(
 		[Parameter(Mandatory, Position=0)]
 		[ValidateNotNullOrEmpty()]
-		[String] $HostName
+		[String] $HostName,
+
+		[Parameter(DontShow)]
+		[Switch] $IndentOutput
 	)
 
+	$Indent = ''
+	If ($IndentOutput) {
+		$Indent = '├──'
+	}
+
 	If (Test-IPv4Address $HostName) {
-		Write-GoodNews "IP: The server $HostName has an IPv4 address."
+		Write-GoodNews "${Indent}IP: The server $HostName has an IPv4 address."
 	}
 	Else {
-		Write-BadPractice "IP: The server $HostName has no IPv4 addresses. IPv4-only clients cannot reach this server."
+		Write-BadPractice "${Indent}IP: The server $HostName has no IPv4 addresses. IPv4-only clients cannot reach this server."
 	}
 
 	If (Test-IPv6Address $HostName) {
-		Write-GoodNews "IP: The server $HostName has an IPv6 address."
+		Write-GoodNews "${Indent}IP: The server $HostName has an IPv6 address."
 	}
 	Else {
-		Write-BadPractice "IP: The server $HostName has no IPv6 addresses. IPv6-only clients cannot reach this server!"
+		Write-BadPractice "${Indent}IP: The server $HostName has no IPv6 addresses. IPv6-only clients cannot reach this server!"
 	}
 }
 
@@ -691,7 +699,7 @@ Function Test-MXRecord
 		Else {
 			Write-GoodNews "MX: The server $($_.Server) can receive mail for this domain (at priority $($_.Preference))."
 		}
-		Test-IPVersions ($_.Server)
+		Test-IPVersions ($_.Server) -Indent
 	}
 }