GetTextTest: Use StandardCharsets constants instead of CharSet.forName

Change-Id: I61d626495338a89c014187c38a1f6b49accf7af4
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit.test/tst/org/eclipse/jgit/patch/GetTextTest.java

@@ -43,6 +43,8 @@
 
 package org.eclipse.jgit.patch;
 
+import static java.nio.charset.StandardCharsets.ISO_8859_1;
+import static java.nio.charset.StandardCharsets.UTF_8;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
@@ -58,7 +60,7 @@ import org.junit.Test;
 public class GetTextTest {
 	@Test
 	public void testGetText_BothISO88591() throws IOException {
-		final Charset cs = Charset.forName("ISO-8859-1");
+		final Charset cs = ISO_8859_1;
 		final Patch p = parseTestPatchFile();
 		assertTrue(p.getErrors().isEmpty());
 		assertEquals(1, p.getFiles().size());
@@ -69,7 +71,7 @@ public class GetTextTest {
 
 	@Test
 	public void testGetText_NoBinary() throws IOException {
-		final Charset cs = Charset.forName("ISO-8859-1");
+		final Charset cs = ISO_8859_1;
 		final Patch p = parseTestPatchFile();
 		assertTrue(p.getErrors().isEmpty());
 		assertEquals(1, p.getFiles().size());
@@ -80,8 +82,8 @@ public class GetTextTest {
 
 	@Test
 	public void testGetText_Convert() throws IOException {
-		final Charset csOld = Charset.forName("ISO-8859-1");
-		final Charset csNew = Charset.forName("UTF-8");
+		final Charset csOld = ISO_8859_1;
+		final Charset csNew = UTF_8;
 		final Patch p = parseTestPatchFile();
 		assertTrue(p.getErrors().isEmpty());
 		assertEquals(1, p.getFiles().size());
@@ -100,8 +102,8 @@ public class GetTextTest {
 
 	@Test
 	public void testGetText_DiffCc() throws IOException {
-		final Charset csOld = Charset.forName("ISO-8859-1");
-		final Charset csNew = Charset.forName("UTF-8");
+		final Charset csOld = ISO_8859_1;
+		final Charset csNew = UTF_8;
 		final Patch p = parseTestPatchFile();
 		assertTrue(p.getErrors().isEmpty());
 		assertEquals(1, p.getFiles().size());