Reuse Turkish locale setup

src/test/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/ApacheLicenseResourceTransformerTest.groovy

@@ -36,11 +36,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue
 class ApacheLicenseResourceTransformerTest extends TransformerTestSupport<ApacheLicenseResourceTransformer> {
 
     static {
-        /*
-         * NOTE: The Turkish locale has an usual case transformation for the letters "I" and "i", making it a prime
-         * choice to test for improper case-less string comparisions.
-         */
-        Locale.setDefault(new Locale("tr"))
+        setupTurkishLocale()
     }
 
     @BeforeEach

src/test/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/ApacheNoticeResourceTransformerTest.groovy

@@ -39,11 +39,7 @@ class ApacheNoticeResourceTransformerTest extends TransformerTestSupport<ApacheN
     private static ShadowStats stats
 
     static {
-        /*
-         * NOTE: The Turkish locale has an usual case transformation for the letters "I" and "i", making it a prime
-         * choice to test for improper case-less string comparisions.
-         */
-        Locale.setDefault(new Locale("tr"))
+        setupTurkishLocale()
     }
 
     @BeforeEach

src/test/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/AppendingTransformerTest.groovy

@@ -33,13 +33,8 @@ import static org.junit.jupiter.api.Assertions.assertTrue
  */
 class AppendingTransformerTest extends TransformerTestSupport<AppendingTransformer> {
 
-    static
-    {
-        /*
-         * NOTE: The Turkish locale has an usual case transformation for the letters "I" and "i", making it a prime
-         * choice to test for improper case-less string comparisions.
-         */
-        Locale.setDefault(new Locale("tr"))
+    static {
+        setupTurkishLocale()
     }
 
     @BeforeEach

src/test/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/TransformerTestSupport.groovy

@@ -12,4 +12,12 @@ abstract class TransformerTestSupport<T extends Transformer> {
     protected static FileTreeElement getFileElement(String path) {
         return new DefaultFileTreeElement(null, RelativePath.parse(true, path), null, null)
     }
+
+    /**
+     * NOTE: The Turkish locale has an usual case transformation for the letters "I" and "i", making it a prime
+     * choice to test for improper case-less string comparisons.
+     */
+    protected static setupTurkishLocale() {
+        Locale.setDefault(new Locale("tr"))
+    }
 }

src/test/groovy/com/github/jengelman/gradle/plugins/shadow/transformers/XmlAppendingTransformerTest.groovy

@@ -36,11 +36,7 @@ import static org.junit.jupiter.api.Assertions.assertTrue
 class XmlAppendingTransformerTest extends TransformerTestSupport<XmlAppendingTransformer> {
 
     static {
-        /*
-         * NOTE: The Turkish locale has an usual case transformation for the letters "I" and "i", making it a prime
-         * choice to test for improper case-less string comparisons.
-         */
-        Locale.setDefault(new Locale("tr"))
+        setupTurkishLocale()
     }
 
     @BeforeEach