Markdown conversion for pt-BR - Cleanup - JavaScript section

[SphinxKnight]

Here is the conversion report after those steps: https://gist.github.com/SphinxKnight/e66a41050cc8314ab9fcfd527ef8201f#file-md-conversion-problems-report-2022-08-24t11_56_01-204z-md

N.B. this PR does not convert the content, merely prepares it for conversion.

[josielrocha]

Hi @SphinxKnight,

Thank you a lot for your contribution. Unfortunatelly there are some conflicts in these files:

files/pt-br/web/javascript/a_re-introduction_to_javascript/index.html
files/pt-br/web/javascript/closures/index.html
files/pt-br/web/javascript/reference/global_objects/array/flatmap/index.html

Could you please fix them and mention me?
I would be glad to review your PR again ;)

[SphinxKnight]

Thanks @josielrocha I've merged based on main and rechecked the markdown conversion tool and edited accordingly. Here is the updated conversion report: https://gist.github.com/SphinxKnight/e66a41050cc8314ab9fcfd527ef8201f#file-md-conversion-problems-report-2022-09-10t15_14_42-826z-md

[josielrocha]

LGTM ;)