Pull Request for Issue (no issue). Found while doing code review.

Summary of Changes

Currently, the array keys passed to MailTemplate::replaceTags() are directly used within the regular expression. This is prone to errors, if ever some array keys are used that contain special characters (e.g. +, *, ...).

Quoting the key should prevent some possible (future) weird behaviour, if an array key contains a regex control character. This should not create any b/c problems, as afaik no keys with special characters are currently defined/used. Also, regular expression control chars could not be used in a sensible way in this place anyways.

Testing Instructions

• enable action log emails for the user component (in the settings of yxour personal account)
• perform some actions, e.g. loggin out and back again
• look at the sent emails

Actual result BEFORE applying this Pull Request

it works (the email contains information and no placeholders)

Expected result AFTER applying this Pull Request

it still works (no visble change to above)

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed