[pl] chapter 7 improvements
[pl] s/tą komendę/tę komendę/
Fix issue #620
[ko] update fonts and thanks for pdf
[ko] update ko/README
[ko] update translation
[ko] fix typo.
[ko] fix punctuations for figure
Fix broken syntax
Merge pull request #623 from gibas/07-customizing-git

[pl] chapter 7 improvements
Merge pull request #624 from gibas/fix-ta-komende

[pl] s/tą komendę/tę komendę/
Merge pull request #625 from BrodaNoel/issue620

Fix issue #620
Merge pull request #626 from dogfeet/ko

[ko] update translation
Merge pull request #628 from BrodaNoel/fixsyntax

Fix broken syntax
Merge pull request #627 from progit-de/next

Merge changes from english translation to german translation