[ru] chapter 2: Incorporate changes from commit df7639bb6d

"Add an example on `**/` pattern to the example of .gitignore file."
[ru] Incorporate changes from commit 51ba3fa4cc

"Don't mention Git of pre-1.6 versions."
[ru] chapter 2: Use formatting in tables and clean up `git log` options description
[ru] chapter 8: Make command for getting author names from SVN consistent with its description
[ru] chapter 4: commas and grammar
Merge pull request #419 from GArik/RU

RU: Updates and corrections