Merge branch 'matteo' into 'master'

Fixed 1. and 2.

See merge request matros/git_tutorial!4

README.md

@@ -2,8 +2,8 @@
 This is a hands-on tutorial on how to learn git.
 
 ## Find the mistakes
-1. It is raining when I got home last night.
-2. My sister is annoying today, but usually she is nice.
+1. It was raining when I got home last night.
+2. My sister was annoying today, but usually she is nice.
 3. I have not ate anything today.
 4. If I am a child, I would play outside.
 5. Everyone have seen that movie.