Bug-fix (CIDRAM/CIDRAM#486).

Changelog excerpt:
- The aggregator's constructTables method was constructing the wrong IPv6
  netmask for last hextet; Fixed.

Changelog.txt

@@ -20,6 +20,9 @@ Versioning guidelines for SemVer can be found at: https://semver.org/
 
 - [2022.12.09; Maikuolan]: Avoid packaging unnecessary files into dist.
 
+- [2023.08.03; Bug-fix; neufeind]: The aggregator's constructTables method was
+  constructing the wrong IPv6 netmask for last hextet; Fixed.
+
 === Version/Release 1.3.3 ===
 PATCH RELEASE.
 

src/Aggregator.php

@@ -1,6 +1,6 @@
 <?php
 /**
- * Aggregator v1.3.4 (last modified: 2022.05.25).
+ * Aggregator v1.3.4 (last modified: 2023.08.03).
  * @link https://github.com/CIDRAM/Aggregator
  *
  * Description: A stand-alone class implementation of the IPv4+IPv6 IP+CIDR
@@ -161,7 +161,7 @@ private function constructTables()
         $CIDR = 128;
         for ($Octet = 8; $Octet > 0; $Octet--) {
             $Base = str_repeat('ffff:', $Octet - 1);
-            $End = ($Octet === 8) ? ':0' : '::';
+            $End = ($Octet === 8) ? '' : '::';
             for ($Addresses = 1, $Iterate = 0; $Iterate < 16; $Iterate++, $Addresses *= 2, $CIDR--) {
                 $Netmask = $Base . (dechex(65536 - $Addresses)) . $End;
                 $this->TableNetmaskIPv6[$CIDR] = $Netmask;