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Merge changes from trunk (removal of extra commas)

Fix misuse of comma: "X, Y, o Z" -> "X, Y o Z"
(Spanish doesn't use the Oxford comma)

Merge changes from trunk (fixes to typos in manual)

Fix typo: intereprets -> interprets

Fix typo in GUARDAGIF: possible -> posible

Document that the network API encodes data in the system default Windows code page.

Merge in fixes to spanish manual from trunk

Fix widespread grammar error of "lo devulto".
The neuter article "lo" is only used for abstract ideas. It is therefore inappropriate to be used for return values.

Merge in changes from trunk (mostly updates to network tests, docs)

Document that data sent over the network is first PRINT'd and data received from the network is PARSE'd.