PluginOutput: preserve character after comma

refs #11728

modules/monitoring/application/views/helpers/PluginOutput.php

@@ -54,7 +54,7 @@ class Zend_View_Helper_PluginOutput extends Zend_View_Helper_Abstract
         // Help browsers to break words in plugin output
         $output = trim($output);
         // Add space after comma where missing
-        $output = preg_replace('/,[^\s]/', ', ', $output);
+        $output = preg_replace('/,(?=[^\s])/', ', ', $output);
         // Add zero width space after ')', ']', ':', '.', '_' and '-' if not surrounded by whitespaces
         $output = preg_replace('/([^\s])([\\)\\]:._-])([^\s])/', '$1$2​$3', $output);
         // Add zero width space before '(' and '[' if not surrounded by whitespaces