[fi] Fixed grammar and typos
[fi] Apply all updates.
[fi] Fixed grammar near the inline code blocks.
[pl] first part of translation of chapter 7
Merge pull request #473 from gibas/07-customizing-git

[pl] first part of translation of chapter 7
Merge pull request #472 from jukkah/master

[fi] Updated Finnish translation
[fi] Fixed the problem that caused the build to fail

I can't test right now if this fix is working.
Merge pull request #474 from jukkah/master

[fi] Fixed the problem that caused the build to fail after #472