A DESCRIPTION OF THE PROBLEM :
Put a @since 1.7 on System.lineSeparator

(This is platform independent, but this wonderful bug tool force me to choose an OS)

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
/**
     * Returns the system-dependent line separator string. It always
     * returns the same value - the initial value of the {@linkplain
     * #getProperty(String) system property} {@code line.separator}.
     *
     * <p>On UNIX systems, it returns {@code "\n"}; on Microsoft
     * Windows systems it returns {@code "\r\n"}.
    * @since 1.7
     */
ACTUAL -
/**
     * Returns the system-dependent line separator string. It always
     * returns the same value - the initial value of the {@linkplain
     * #getProperty(String) system property} {@code line.separator}.
     *
     * <p>On UNIX systems, it returns {@code "\n"}; on Microsoft
     * Windows systems it returns {@code "\r\n"}.
     */

URL OF FAULTY DOCUMENTATION :
http://hg.openjdk.java.net/jdk7/jdk7/jdk/rev/0dcdb13ab6d0