Why can be that in the source panel underscores sometimes are visible sometimes not?
It seems to be independent of the editor theme, since I tried with others beyond the one I am using and I got the same issue.
I am not sure if it is actually a bug or can be another kind of issue (distinct underscores encoding?, but in my example below ascii/heaxedecimal give the same output 5F), so I ask here before filling a github issue.
I am using R 3.6.3 and RStudio 1.3.1093 on Debian 9, RStudio theme Modern and editor theme Solarized Dark. If you need more details please ask me.
In next both images, num_subjects and intensity_avg have underscores, but one is in Source panel (one can see the underscore of intensity_avg but not the one of num_subjects) and the other is in the Console panel, so one can see both underscores.
Thank you!