CSE: Imported rune constants appear to be bound to strings; formating issues

[martin-henz]

Currently we have:

The environment shows "< RUNE >" instead of just . This makes it look like the value is a string.

Also note that the string "< RUNE >" exceeds the boundary of the frame box. This problem appears to be solved for real strings:

[martin-henz]

This is handled in the latest version.