Apply suggestions from code review

Incorporate @caddoo's suggested changes

Co-authored-by: caddoo <matthew.caddoo@gmail.com>

core/FileIntegrity.php

@@ -92,7 +92,7 @@ protected static function getMessagesDirectoriesFoundButNotExpected($messages)
 
             $directories = array();
             foreach ($directoriesFoundButNotExpected as $directoryFoundNotExpected) {
-                $directories[] = htmlspecialchars($directoryFoundNotExpected);
+                $directories[] = htmlspecialchars(realpath(dirname($directoryFoundNotExpected)). DIRECTORY_SEPARATOR . basename($directoryFoundNotExpected));
             }
 
             $deleteAllAtOnce = array();
@@ -138,7 +138,8 @@ protected static function getMessagesFilesFoundButNotExpected($messages)
 
             $files = array();
             foreach ($filesFoundButNotExpected as $fileFoundNotExpected) {
-                $files[] = '"' . htmlspecialchars($fileFoundNotExpected) . '"';
+                $files[] = '"' . htmlspecialchars(realpath(dirname($fileFoundNotExpected)). DIRECTORY_SEPARATOR . basename($fileFoundNotExpected)) . '"';
+
             }
 
             $deleteAllAtOnce = array();