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
createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_before_at, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_AT_IN_ANNOTATION_TYPE_DECLARATION, ANNOTATION_DECL_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_after_at, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_AFTER_AT_IN_ANNOTATION_TYPE_DECLARATION, ANNOTATION_DECL_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_before_opening_brace, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_OPENING_BRACE_IN_ANNOTATION_TYPE_DECLARATION, ANNOTATION_DECL_PREVIEW); 
        
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_annot_type_method_before_opening_paren, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_OPENING_PAREN_IN_ANNOTATION_TYPE_MEMBER_DECLARATION, ANNOTATION_DECL_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_annot_type_method_between_empty_parens, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BETWEEN_EMPTY_PARENS_IN_ANNOTATION_TYPE_MEMBER_DECLARATION, ANNOTATION_DECL_PREVIEW); 
        return root;
    }
    
    private static InnerNode createEnumTree(Map workingValues, InnerNode parent) {
        final InnerNode root= new InnerNode(parent, workingValues, FormatterMessages.WhiteSpaceTabPage_enums); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_decl_before_opening_brace, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_OPENING_BRACE_IN_ENUM_DECLARATION, ENUM_PREVIEW); 
        
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_decl_before_comma, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_COMMA_IN_ENUM_DECLARATIONS, ENUM_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_decl_after_comma, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_AFTER_COMMA_IN_ENUM_DECLARATIONS, ENUM_PREVIEW); 
    
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_arg_before_opening_paren, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_OPENING_PAREN_IN_ENUM_CONSTANT, ENUM_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_arg_after_opening_paren, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_AFTER_OPENING_PAREN_IN_ENUM_CONSTANT, ENUM_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_arg_between_empty_parens, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BETWEEN_EMPTY_PARENS_IN_ENUM_CONSTANT, ENUM_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_arg_before_comma, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_COMMA_IN_ENUM_CONSTANT_ARGUMENTS, ENUM_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_arg_after_comma, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_AFTER_COMMA_IN_ENUM_CONSTANT_ARGUMENTS, ENUM_PREVIEW); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_arg_before_closing_paren, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_CLOSING_PAREN_IN_ENUM_CONSTANT, ENUM_PREVIEW); 
        
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_enum_const_before_opening_brace, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_OPENING_BRACE_IN_ENUM_CONSTANT, ENUM_PREVIEW); 
        return root;
    }
    
    private static InnerNode createParameterizedTypeTree(Map workingValues, InnerNode parent) {
        final InnerNode root= new InnerNode(parent, workingValues, FormatterMessages.WhiteSpaceTabPage_param_type_ref); 
        createOption(root, workingValues, FormatterMessages.WhiteSpaceTabPage_before_opening_angle_bracket, DefaultCodeFormatterConstants.FORMATTER_INSERT_SPACE_BEFORE_OPENING_ANGLE_BRACKET_IN_PARAMETERIZED_TYPE_REFERENCE, PARAMETERIZED_TYPE_REFERENCE_PREVIEW);