Remove exec rights on fr/02-git-basics/01-chapter2.markdown
[fr] Chapter 1 corrections
[fr] Chapter 2 corrections
[fr] Chapter 3 corrections
[fr] Chapter 4 corrections
Merge pull request #353 from phambourg/fr_corrections

[fr] Chapters 1-4 corrections
makeebooks: assign default values of titles

Assign default values to figure_title, book_title, authors and
comments. To prevent variables from being 'nil' or previous values.
makeebooks: remove duplication
Merge pull request #354 from southly/fix-makeebooks

Fix makeebooks