Signed-off-by: Hosein <hosein@hosein-K53SD>
Update 01-chapter9.markdown
Merge pull request #895 from liancheng/patch-1

Fixed typo in 01-chapter9.markdown
Merge pull request #864 from hbsciw/master

[fa] update chapter 4
Merge branch 'master' of https://github.com/progit/progit.git
[cs] wording in ch. 2