* Corrections to many issues found by QA scripts, as well as alignment of line numbers between en and pt_br xml files
* Update to abandoned/outdated/missing pages in reference/filesystem/
* Correction to parameter 'filename'
* Updates to abandoned/outdated/missing pages in reference/var/
* Updates to match recent revision in `en` pages
* update to migration83/other-changes.xml according to last english revision
* update to language/types/float.xml according to last `en` version
* update to reference/calendar/constants.xml according to last `en`version
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Co-authored-by: LEONARDO LARA RODRIGUES <leonardolara@github.com>