[cp-patches] Documentation update for java.util.GregorianCalendar

[Andrew John Hughes]

Here's the next part in what seems to have extended into
a full audit of at least the documentation in java.util.
This one is GregorianCalendar, and it is also adds the odd
fix to code compilation with Jikes and serialization.
-- 
Andrew :-)

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util_doc_patch_05.diff
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