kana minor edits, fixing wrong case

FontTestGDX/src/FontTestGDX.kt

@@ -25,7 +25,7 @@ class FontTestGDX : Game() {
     private val testing = false
 
     private val demotextName = if (testing) "testtext.txt" else "demotext.txt"
-    private val outimageName = if (testing) "testing.png" else "demo.png"
+    private val outimageName = if (testing) "testing.PNG" else "demo.PNG"
 
     override fun create() {
         font = GameFontBase("./assets", flipY = false, errorOnUnknownChar = false) // must test for two flipY cases