Use pattern matching in genericeditor tests

Author: akurtakov

tests/org.eclipse.ui.genericeditor.tests/src/org/eclipse/ui/genericeditor/tests/ContextInfoTest.java

@@ -126,11 +126,11 @@ private String getInfoText(final Shell shell) {
 		assertTrue(shell.isVisible());
 		Control[] children= shell.getChildren();
 		for (Control child : children) {
-			if (child instanceof Text) {
-				return ((Text) child).getText();
+			if (child instanceof Text text) {
+				return text.getText();
 			}
-			if (child instanceof StyledText) {
-				return ((StyledText) child).getText();
+			if (child instanceof StyledText styled) {
+				return styled.getText();
 			}
 		}
 		return null;