FMSLogo Code

Fix a regression caused by recent refactoring.

Update with a recent test pass for FMSLogo 8.0.0pre

Fix grammatical error (observas -> observa for imperative tense)

Fix spelling error: sóla -> sola

Fix punctuation errors (Spanish doesn't have a serial comma)

Remove paragraph breaks around program listing.
This is more correct according to the document model but has no impact on the generated HTML.

Put all sentences on their own line for consistency.
This has no impact on the generated HTML.

Fix bad punctuation (Spanish doesn't have a serial comma)

Add clearer documentation about how \n is handled (including within vertical bars)

Change the string node header from unsigned short to wchar_t.
This fixes an alignment problem on GNU/Linux, where wchar_t is four bytes, but short is 2 bytes.
It also makes the code look cleaner by removing a lot of type casting.
This should have no effect on Windows, where wchar_t and short are both 2 bytes.