Bug 76530 [options] Warn about unused local variables and private members
I think we should warn about unused local variables and unused private members by default. These things are errors akin to unused imports, which we already warn about.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/quickfix/ReturnTypeQuickFixTest.java
assertTrue("duplicated entries", addReturnType);
				addReturnType= false;		
		
				String preview= getPreviewContent(proposal);
		
				buf= new StringBuffer();
				buf.append("package test1;\n");
				buf.append("import java.util.Enumeration;\n");		
				buf.append("import java.util.Vector;\n");
				buf.append("public class E {\n");
				buf.append("    public Enumeration foo() {\n");
				buf.append("        return (new Vector()).elements();\n");
				buf.append("    }\n");
				buf.append("}\n");
				assertEqualString(preview, buf.toString());
			} else {
				assertTrue("duplicated entries", doRename);
				doRename= false;
				
				CUCorrectionProposal proposal= (CUCorrectionProposal) elem;
				String preview= getPreviewContent(proposal);
				buf= new StringBuffer();
				buf.append("package test1;\n");
				buf.append("import java.util.Vector;\n");				
				buf.append("public class E {\n");
				buf.append("    public E() {\n");
				buf.append("        return (new Vector()).elements();\n");
				buf.append("    }\n");
				buf.append("}\n");
				assertEqualString(preview, buf.toString());