Fix #8795 gmt image -I inversion#8837

Merged

seisman merged 2 commits intoGenericMappingTools:masterfrom

ES-Solar:fix-invert-8795-clean

Dec 10, 2025

Commits on Dec 4, 2025

Fix -I invert option for 2-color palette images (#8795)
ES-Solar
committed

Commits on Dec 9, 2025

Add test for -I invert option on 2-color iages (#8795)
ES-Solar
committed