Bug 111139 Add FORMATTER_INSERT_SPACE_BEFORE_PARENTHESIZED_EXPRESSION_IN_RETURN to the code formatter preference page
This new option should be added in the whitespace section (control statements) of the code formatter preference page. It makes the insertion of a space after the return keyword optional when the following expression is a cast expression, a parenthesized expression, a string literal or prefix expression. For all other types of expressions, the insertion of a space is mandatory.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/formatter/WhiteSpaceOptions.java
* @param workingValues
     * @return returns roots (type <code>Node</code>)
     */
    public static List createAltTree(Map workingValues) {
        final ArrayList roots= new ArrayList();
        
        InnerNode parent;
        
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_before_opening_paren); 
        createBeforeOpenParenTree(workingValues, parent);
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_after_opening_paren); 
        createAfterOpenParenTree(workingValues, parent);
        
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_before_closing_paren); 
        createBeforeClosingParenTree(workingValues, parent); 
        
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_after_closing_paren); 
        createAfterCloseParenTree(workingValues, parent);
        
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_between_empty_parens); 
        createBetweenEmptyParenTree(workingValues, parent);
        
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_before_opening_brace); 
        createBeforeOpenBraceTree(workingValues, parent);
        
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_after_opening_brace); 
        createAfterOpenBraceTree(workingValues, parent);
        parent= createParentNode(roots, workingValues, FormatterMessages.WhiteSpaceOptions_before_closing_brace); 
        createBeforeClosingBraceTree(workingValues, parent);