There are two places where a space needs to be inserted ahead of the opening parenthesis '('

In this file:
src/share/classes/com/sun/tools/doclets/standard/resources/standard.properties

doclet.link_option_twice=Extern URL link option(link or linkoffline) used twice.
                                               ^
                                               |
                                      ADD A SINGLE SPACE

  -doctitle <html-code> Include title for the package index(first) page\n
                                                               ^
                                                               |
                                                      ADD A SINGLE SPACE