etc/tutorials/TUTORIAL.he: Use u+05f4 HEBREW PUNCTUATION GERSHAYIM
 instead of u+0022 QUOTATION MARK in Hebrew acronyms.

These are dates that admin/update-copyright did not update,
or updated incorrectly.

Run admin/update-copyright.

* tutorials/TUTORIAL.es: Improve style consistency.

* tutorials/TUTORIAL.es: Spelling fixes.

Thanks to Jorgen Schäfer for help with the translation.

* tutorials/TUTORIAL, tutorials/TUTORIAL.cs, tutorials/TUTORIAL.eo:
* tutorials/TUTORIAL.es, tutorials/TUTORIAL.it, tutorials/TUTORIAL.ja:
* tutorials/TUTORIAL.ko, tutorials/TUTORIAL.nl, tutorials/TUTORIAL.pl:
* tutorials/TUTORIAL.pt_BR, tutorials/TUTORIAL.ro:
* tutorials/TUTORIAL.ru, tutorials/TUTORIAL.sk, tutorials/TUTORIAL.sv:
* tutorials/TUTORIAL.th:
Avoid using ` for natural-language quotes.  Instead, work around
the problem with "\" by using non-" quotation marks appropriate
for the natural language in question, e.g., «...» for Spanish.
For English “...” could be used, but use '...' instead so that
TUTORIAL continues to be encoded in ASCII.

Otherwise Emacs can get confused and think the rest of the buffer is
a string.