Replace issue-195 test

tests/reduction.rs

@@ -722,6 +722,18 @@ fn grayscale_alpha_8_should_be_grayscale_8() {
     );
 }
 
+#[test]
+fn grayscale_alpha_8_should_be_palette_8() {
+    test_it_converts(
+        "tests/files/grayscale_alpha_8_should_be_palette_8.png",
+        false,
+        GRAYSCALE_ALPHA,
+        BitDepth::Eight,
+        INDEXED,
+        BitDepth::Eight,
+    );
+}
+
 #[test]
 fn grayscale_16_should_be_grayscale_16() {
     test_it_converts(

tests/regression.rs

@@ -226,18 +226,6 @@ fn issue_182() {
     );
 }
 
-#[test]
-fn issue_195() {
-    test_it_converts(
-        "tests/files/issue-195.png",
-        None,
-        RGBA,
-        BitDepth::Eight,
-        INDEXED,
-        BitDepth::Eight,
-    );
-}
-
 #[test]
 fn issue_426_01() {
     test_it_converts(