Arthur Sávio

Patterns and flags

1

Retranslation done. I removed 'article-pt.md' file too, just to keep the quantity of files same as the english.

Character classes

5

Specified changes in commits. Just following english version: https://github.com/javascript-tutorial/en.javascript.info/tree/master/9-regular-expressions/02-regexp-character-classes

Methods of RegExp and String

12

Translation to portuguese done. Followed the english version again. Source file can be found: https://github.com/javascript-tutorial/en.javascript.info/blob/master/9-regular-expressions/17-regexp-methods/article.md