8201498: test/langtools/tools/javac/diags/CheckExamples.java 6 errors occurred

Remove duplicate class names in diagnostic examples.

Reviewed-by: jlahoda

test/langtools/tools/javac/diags/examples/PreviewPlural/PreviewPlural.java

@@ -31,7 +31,7 @@ import java.util.ArrayList;
 
 class PreviewPlural {
     void test() {
-        new Bar();
+        new PreviewPluralBar();
         new ArrayList<>();
     }
 }

test/langtools/tools/javac/diags/examples/PreviewPlural/PreviewPluralBar.java

@@ -23,6 +23,6 @@
  * questions.
  */
 
-class Bar {
+class PreviewPluralBar {
     Runnable r = () -> {};
 }

test/langtools/tools/javac/diags/examples/PreviewPluralAdditional/PreviewPluralAdditional.java

@@ -30,9 +30,9 @@
 
 import java.util.ArrayList;
 
-class PreviewPlural {
+class PreviewPluralAdditional {
     void test() {
-        new Bar();
+        new PreviewPluralAdditionalBar();
         new ArrayList<>();
     }
 }

test/langtools/tools/javac/diags/examples/PreviewPluralAdditional/PreviewPluralAdditionalBar.java

@@ -25,7 +25,7 @@
 
 import java.util.ArrayList;
 
-class Bar {
+class PreviewPluralAdditionalBar {
     Runnable r = () -> {};
     void test() {
         new ArrayList<>();