Remove duplicated spaces before `when matched`

[quaff]

trafficstars

Running org.hibernate.orm.test.stateless.UpsertTest:

Before -> merge into "UpsertTest$Record" as t using (select cast(? as bigint) id, cast(? as varchar) message) as s on (t.id=s.id) when not matched then insert (id, message) values (s.id, s.message) when matched then update set message=s.message After -> merge into "UpsertTest$Record" as t using (select cast(? as bigint) id, cast(? as varchar) message) as s on (t.id=s.id) when not matched then insert (id, message) values (s.id, s.message) when matched then update set message=s.message

[Please describe here what your change is about]

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[quaff]

Could you review this also? @gavinking

[quaff]

If I'm not mistaken, there appears to be a similar problem in SqlAstTranslatorWithUpsert. Could you take a look at that one too, please?

Indeed, I've fixed that also.

[gavinking]

Great, thank you!