[es] Update Chapter 2 from english version

Update from commit "Chapter 2 improvements and corrections " cfdce8587ed1654f07665660d5347a4b6309a062
[es] Update Chapter 2: new sentence from English version

Updated from "Minor updates (Windows & typo)" b294744d98a6f6cdbc3508b0058f8616147c1596
[es] Update Chapter 2: new sentence from English version

Updated from commit: "Mention --oneline in Table 2-2"
5502e94d3237d285eb3157cc7e4d6710d650464e
[es] Update Chapter 2 from English version

Updated from commit: "Add an example on `**/` pattern to the example of .gitignore file."
df7639bb6d5b6ef453de18bd43d0b7f59464d1ab
[es] Update Chapter 2: Translation of some new English paragraphs

Updated from commit: "Add --word-diff option description"
716e1926c63890027cf133492bf59c8f05e8bfa1