Duplicate words typos in comments/javadoc/strings

[Pavel Rappo]

> On 29 Jan 2019, at 08:50, David Holmes <david.holmes at oracle.com> wrote:
> 
> Hi Pavel,
> 
> I don't think this kind of trivial change needs the OCA to be signed.
> 
> "A Participant may post messages to a list, submit simple patches, and make other kinds of small contributions." [1]

Hi David,

That is true. However, I'm not sure how to distinguish between a trivial patch
and a not so trivial.