glasses-original-separator

glasses-original-separator is a variable defined in `glasses.el'.
Its value is

"_"

Documentation:
String to be displayed as `glasses-separator' in separator positions.
For instance, if you set it to "_" and set `glasses-separator' to "-",
underscore separators are displayed as hyphens.
If `glasses-original-separator' is an empty string, no such display change is
performed.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 22.1 of Emacs.