Update docstrings

Author: Raphire

Scripts/Features/Backup-RegistrySnapshotCapture.ps1

@@ -201,7 +201,8 @@ function Get-RegistryKeySnapshot {
 
     .DESCRIPTION
         Captures all values or selected value names, records missing selected values,
-        and recursively captures subkeys when requested.
+        and recursively captures subkeys when requested. Throws if a requested subkey
+        cannot be read.
 #>
 function Convert-RegistryKeyToSnapshot {
     param(

Scripts/Features/Invoke-Changes.ps1

@@ -302,8 +302,8 @@ function Invoke-UndoFeatures {
 
     .DESCRIPTION
         Sequenced in four phases:
-        1. Registry backup
-        2. System restore point
+        1. Registry backup (skipped when SkipRegistryBackup is present)
+        2. System restore point (skipped when CreateRestorePoint is absent)
         3. Apply phase - applies all selected features via Invoke-ApplyFeatures
         4. Undo phase - undoes selected features via Invoke-UndoFeatures
 

Scripts/Features/Restore-RegistryApplyState.ps1

@@ -71,7 +71,10 @@ function Restore-RegistryKeySnapshot {
 
 <#
     .SYNOPSIS
-        Validates all registry values in a snapshot before live registry state is changed.
+        Validates registry values and subkey paths in a snapshot before live registry state is changed.
+
+    .PARAMETER Snapshot
+        The registry key snapshot to validate before it is restored.
 #>
 function Test-RegistryKeySnapshotCanBeRestored {
     param(
@@ -101,6 +104,12 @@ function Test-RegistryKeySnapshotCanBeRestored {
 <#
     .SYNOPSIS
         Returns a snapshot child's name only when it is directly below its parent.
+
+    .PARAMETER ParentPath
+        The registry path of the expected parent snapshot.
+
+    .PARAMETER ChildPath
+        The registry path of the child snapshot to validate.
 #>
 function Get-DirectRegistrySnapshotChildName {
     param(