Remove some stray case changes

Author: mwcraig

src/astro_image_display_api/dummy_viewer.py

@@ -155,7 +155,7 @@ def set_colormap(self, map_name: str, image_label: str | None = None) -> None:
         image_label = self._resolve_image_label(image_label)
         if image_label not in self._images:
             raise ValueError(f"Image label '{image_label}' not found. Please load an image first.")
-        self._images[image_label].colormap = map_name.lower()
+        self._images[image_label].colormap = map_name
 
     set_colormap.__doc__ = ImageViewerInterface.set_colormap.__doc__
 

src/astro_image_display_api/widget_api_test.py

@@ -736,7 +736,7 @@ def test_set_get_colormap_map_name_case_insensitive(self, data):
         self.image.load_image(data, image_label='test')
         cmap_desired = 'GrAy'
         self.image.set_colormap(cmap_desired)
-        assert self.image.get_colormap() == cmap_desired.lower()
+        assert self.image.get_colormap() == cmap_desired
 
         # Set the colormap with a different case
         new_cmap = "Viridis"