Using a constant as a global variable name gives unclear closing bracket error

[LaCuneta]

This is similar to #1604 , but different enough that I'd expect the fix to be different, too.

You can create a declaration like globals [ a b c d e f g ] in a NetLogo model, and the compiler error you will see is "closing bracket expected" with the e highlighted. This, of course, doesn't make any sense and it takes some thinking to realize what's going on. This only affects constants, so I believe just e and pi. Actual reporters like max-pxcor give a more reasonable "There is already a primitive called..." error.