[doc] Update documentation
[doc] Update documentation

* category.py: See Note (1)
* claimit.py: See Note (1)
* clean_sandbox.py: Use correct English in doc
* commons_information.py: See Note (1)
* illustrate_wikidata.py: See Note (1)
* listpages.py: Better doc
* movepages.py: Use correct English in doc
* parser_function_count.py: There was a missing +
* replicate_wiki.py: Remove extra space from doc
* revertbot.py: More descriptive documentation
* shell.py: See Note (1)
* touch.py: A (slightly better) English wording
* transferbot.py: See Note (1)
* watchlists.py: More descriptive documentation
* casechecker.py: Use better English
* commons_link.py: Use better English
* editarticle.py: See Note (1)
* followlive.py: See Note (2)
* imagecopy.py: See Note (1)
* imageuncat.py: See Note (1)
* table2wiki.py: See Note (1)

* Notes:
* (1) Use Full stops consistently at the end of lines
* (2) wikipedia --> Wikipedia

Change-Id: I42d376ed1a170cf4f08982f69361bdfc53c0dd7f

wikimedia/pywikibot-core,wikimedia/pywikibot-core