[Bug] g.region prints "....default: WGS84..." when there is no datum shift

[afrigeri]

Describe the bug g.region reports

datum: ** unknown (default: WGS84) ** when no datum (shift/rot) is included into the crs definition. This should be updated to something which is not referred to WGS84. In fact, if we consider a crs for the Moon, the absence of shift does not refer to the absence of datum shift of WGS84 but to the current spheroid/ellipsoidal figure.

To Reproduce Steps to reproduce the behavior:

g.region -p

Expected behavior datum: ** unknown (default: no datum shift/rotation) **

Screenshots If applicable, add screenshots to help explain your problem.

System description (please complete the following information):

• Operating System: OSX 12.5.1
• GRASS GIS version 8.2.0