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/AssistQuickFixTest.java
assertNumberOfProposals(proposals, 1);
		assertCorrectLabels(proposals);
		
		CUCorrectionProposal proposal= (CUCorrectionProposal) proposals.get(0);
		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("    private final Vector[] fVec;\n");
		buf.append("\n");
		buf.append("    public  E(int count, Vector vec[]) {\n");
		buf.append("        super();\n");
		buf.append("        fVec = vec;\n");		
		buf.append("    }\n");
		buf.append("}\n");
		assertEqualString(preview, buf.toString());	
	}
	public void testAssignParamToField3() throws Exception {
		Preferences corePrefs= JavaCore.getPlugin().getPluginPreferences();
		corePrefs.setValue(JavaCore.CODEASSIST_STATIC_FIELD_PREFIXES, "fg");
		IPreferenceStore store= JavaPlugin.getDefault().getPreferenceStore();
		store.setValue(PreferenceConstants.CODEGEN_KEYWORD_THIS, true);
		
		IPackageFragment pack1= fSourceFolder.createPackageFragment("test1", false, null);
		StringBuffer buf= new StringBuffer();
		buf.append("package test1;\n");
		buf.append("import java.util.Vector;\n");
		buf.append("public class E {\n");