New comment by balejk on void-packages repository

https://github.com/void-linux/void-packages/pull/36832#issuecomment-1107635075

Comment:
Actually, it's the colon which makes it work as desired:

> If MANPATH begins with a colon, it is appended to the standard
path; if it ends with a colon, it is prepended to the standard
               path; or if it contains two adjacent colons, the standard path
               is inserted between the colons.