win_regedit: Make the string comparison case sensitive when comparing string values (#25536)

* Make the string comparison case sensitive when comparing string values

* Added documentation note about change detection now being case-sensitive

lib/ansible/modules/windows/win_regedit.ps1

@@ -83,7 +83,7 @@ Function Compare-Data {
             return $false
         }
     } elseif ($ReferenceData -is [string] -or $ReferenceData -is [int]) {
-        if ($ReferenceData -eq $DifferenceData) {
+        if ($ReferenceData -ceq $DifferenceData) {
             return $true
         } else {
             return $false

lib/ansible/modules/windows/win_regedit.py

@@ -76,6 +76,7 @@ notes:
 - Check-mode C(-C/--check) and diff output C(-D/--diff) are supported, so that you can test every change against the active configuration before
   applying changes.
 - Beware that some registry hives (C(HKEY_USERS) in particular) do not allow to create new registry paths.
+- Since ansible 2.4, when checking if a string registry value has changed, a case-sensitive test is used.  Previously the test was case-insensitive.
 author: "Adam Keech (@smadam813), Josh Ludwig (@joshludwig)"
 '''