change misleading language identifier
changed dash to underscore
formatting to follow 72 characters line limit
bug #4284 change misleading language identifier (Kristof Van Cauwenbergh, kristofvc)

This PR was merged into the 2.3 branch.

Discussion
----------

change misleading language identifier

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3
| Fixed tickets | #4251

Commits
-------

db85c67 formatting to follow 72 characters line limit
12cccc8 changed dash to underscore
d68cd09 change misleading language identifier