imporve some zh-tw translation in git-diff section
[es] Update Chapter 2

Update from commit "Added fix for git remote -v example" 7ba488683f86e8b507c0f04c36544f512bbc3447
[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
and from commit: "Add --word-diff option description v2"
aa830655d85f8799554a8789a9607347c81e47be
[es] Update Chapter 2: new sentence from English version

Update from commit: "Direct the reader directly to the git-completion download link"
21e84addadf2ea58eebfeb77379fc0434aa952a3
[es] Updated Chapter 2: Included not translated paragraph in a comment

This English paragraph comes from commit: "As of current Git version, --all-match matches greps "
60e261895a77951a6541470c9438f32a1e5b7fd0

I have included it here to not forget that it should be translated if necesary.
Merge pull request #752 from kanhua/master

Some revisions of the translations in chapter 2 (zh-tw)
Merge pull request #760 from mesjetiu/es_chapter_2

Es chapter 2