Fix strings "does not exists"

modules/consentAdmin/www/consentAdmin.php

@@ -274,7 +274,7 @@ foreach ($all_sp_metadata as $sp_entityid => $sp_values) {
             \SimpleSAML\Logger::info('consentAdmin: ok');
             $sp_status = "ok";
         }
-        // Consent does not exists
+        // Consent does not exist
     } else {
         SimpleSAML\Logger::info('consentAdmin: none');
         $sp_status = "none";

modules/statistics/hooks/hook_sanitycheck.php

@@ -28,12 +28,12 @@ function statistics_hook_sanitycheck(&$hookinfo)
             $hookinfo['errors'][] = '[statistics] Statistics dir ['.$statdir.'] is not writable';
         }
     } else {
-        $hookinfo['errors'][] = '[statistics] Statistics dir ['.$statdir.'] does not exists';
+        $hookinfo['errors'][] = '[statistics] Statistics dir ['.$statdir.'] does not exist';
     }
 
     if (file_exists($inputfile)) {
         $hookinfo['info'][] = '[statistics] Input file ['.$inputfile.'] exists';
     } else {
-        $hookinfo['errors'][] = '[statistics] Input file ['.$inputfile.'] does not exists';
+        $hookinfo['errors'][] = '[statistics] Input file ['.$inputfile.'] does not exist';
     }
 }

modules/statistics/lib/Ruleset.php

@@ -33,7 +33,7 @@ class Ruleset
          * Walk through file lists, and get available [rule][fileslot]...
          */
         if (!is_dir($statdir)) {
-            throw new \Exception('Statisics output directory ['.$statdir.'] does not exists.');
+            throw new \Exception('Statisics output directory ['.$statdir.'] does not exist.');
         }
         $filelist = scandir($statdir);
         $this->available = [];