Replace unnecessary double quotes in /libraries/joomla
Formatting
A lot of changes in this one, but they are only from double quotes to single quotes, where appropriate.
Besides the quantity of the changes, this PR should be fairly easy to review. No change in behavior is expected.
I have tested this item✅ successfully on 6617b61
Code review OK
This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/13372.