Summary
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Clarify the Locale.getDisplayName() method description regarding the separators in parentheses.

Problem
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Currently, it is simply a comma character in the spec, which can actually be localized into locale specific separator character.

Solution
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Add a clarifying text.

Specification
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Add the following sentence to the end of the method description of Locale.getDisplayName() and Locale.getDisplayName(Locale), just before the last sentence: ���If the language, script, country, and variant fields are all empty, this function returns the empty string.���

    The field separator in the above parentheses, denoted as a comma character, may be localized depending on the locale.