Signed-off-by: Hosein <hosein@hosein-K53SD>
[ar] translating file editing, checking status, tracking new files, staging modified files, ignoring files
Translating PR878
[it] updating autocompletion output

As per PR #874
Update 01-chapter3.markdown

update sub-head Basic Branching and Merging and partially in sub-sub-header Basic Branching
Merge pull request #881 from daftano/master

[it] Updating translations
Merge pull request #883 from tamami/patch-1

Update 01-chapter3.markdown
[fi] Change the words used as translation for stage/staging area/etc.

The previously used word is based on the wrong meaning of "stage", not the one intended by Git.
Update 01-chapter3.markdown

update in a few paragraph at Basic Branching.
Merge pull request #885 from lanurmi/terminology-stage

[fi] Change the words used as translation for stage/staging area/etc.
Merge pull request #886 from tamami/patch-2

Update 01-chapter3.markdown
Update 01-chapter3.markdown

Translate just one paragraph in Basic Branching
Merge pull request #887 from tamami/patch-3

Update 01-chapter3.markdown
Update 01-chapter2.markdown

"마지막으로 커밋한 후에 수정한 것들 전부를 보여주지 않는다."

all changes made since your last commit의 번역입니다. 

읽다가 조금 이해가 잘 안되어서 원문을 참조했습니다.
Update 01-chapter3.markdown

update 1 (one) paragraph
[ar] translating  and
[ar] translating file editing, checking status, tracking new files, staging modified files, ignoring files
[ar] translating  and
Merge branch 'master' of https://github.com/kaptainzero/progit
Merge pull request #888 from scmaro/patch-1

Update 01-chapter2.markdown