[PATCH] Simple typos fix

Hi everybody,
   thanks a lot for your work.

   This is just a stupid patch to fix some typos.
   Thanks a lot to Magnus for the review.

   You can see it also on GitHub,¹ if you prefer, or
   apply it on top of today latest GIT.²

   It passed "make check" on Linux.

Ciao,
Gelma

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   ¹ https://github.com/Gelma/postgres/commit/6c59961f91b89f55b103c57fffa94308dc29546a
   ² commit: d5ec46bf224d2ea1b010b2bc10a65e44d4456553