Test Text.getLineDelimiter not only on Windows

Some minor syntax improvements too.

Author: akurtakov

tests/org.eclipse.swt.tests/JUnit Tests/org/eclipse/swt/tests/junit/Test_org_eclipse_swt_widgets_Text.java

@@ -515,8 +515,10 @@ public void test_getLineCount() {
 public void test_getLineDelimiter() {
 	String platform = SWT.getPlatform();
 	String delimiter = text.getLineDelimiter();
-	if (platform.equals("win32")) {
-		assertEquals("\r\n", delimiter);
+	switch(platform) {
+		case "win32" -> assertEquals("\r\n", delimiter);
+		case "cocoa" -> assertEquals ("\r", delimiter);
+		default-> assertEquals("\n", delimiter);
 	}
 }
 
@@ -1083,12 +1085,9 @@ public void test_setEditableZ() {
 @Test
 public void test_setFontLorg_eclipse_swt_graphics_Font() {
 	FontData fontData = text.getFont().getFontData()[0];
-	int lineHeight;
-	Font font;
-
-	font = new Font(text.getDisplay(), fontData.getName(), 8, fontData.getStyle());
+	Font font = new Font(text.getDisplay(), fontData.getName(), 8, fontData.getStyle());
 	text.setFont(font);
-	lineHeight = text.getLineHeight();
+	int lineHeight = text.getLineHeight();
 	text.setFont(null);
 	font.dispose();
 	font = new Font(text.getDisplay(), fontData.getName(), 12, fontData.getStyle());