all: Fix simple warnings and cosmetics.

4-high/gel/applet/demo/models/opengl_model/launch_opengl_model.adb

@@ -1,4 +1,3 @@
-with openGL.texture_Set;
 with
      gel.Applet.gui_World,
      gel.Window.setup,
@@ -8,8 +7,8 @@ with
      physics.Model,
 
      openGL.Model.any,
-     openGL.Light,
      openGL.texture_Set,
+     openGL.Light,
 
      ada.Calendar,
      ada.Text_IO,
@@ -86,7 +85,7 @@ begin
    the_Human.Site_is ([0.0, 5.0, 0.0]);                    --
 
    --  the_Applet.gui_World.add (the_Cobra);               -- Add cobra.
-   the_Cobra.Site_is ((0.0,  5.0,  0.0));              --
+   the_Cobra.Site_is ([0.0,  5.0,  0.0]);              --
 
    the_Applet.gui_Camera.Site_is ([0.0, 1.5, 2.6]);        -- Position the camera.
    --  the_Applet.gui_Camera.Site_is ((0.0, 100.0, 0.0));    -- Position the camera.

4-high/gel/applet/demo/sprite/text/launch_text_sprite_demo.adb

@@ -17,8 +17,7 @@ procedure launch_text_sprite_Demo
 --  Shows a few text sprites.
 --
 is
-   use gel.Math,
-       openGL.Palette;
+   use openGL.Palette;
 
    the_Applet : constant gel.Applet.gui_World.view := gel.Forge.new_gui_Applet ("text sprite Demo",
                                                                                 space_Kind => physics.Bullet);