I attempted to add a few variables that start and end with a single tick.

Upon saving it, that leading and trailing ticks were removed. The ticks in the middle remain.

Example:

I added a Value: of '[a1],[a2],{a3},(a4)','[a1],[a2],{a3},(a4)'

After saving it, the value is: [a1],[a2],{a3},(a4)','[a1],[a2],{a3},(a4)

Also, the 'Add a parameter" page for a host has the same problem.