docs(commits_stats) correct grammar

subjects/commits_stats/README.md

@@ -2,26 +2,13 @@
 
 ### Instructions:
 
-In this exercise you will be provided with a json file `commits.json` with data corresponding to git commits in GitHub (extracted using the GitHub rest API). Your objective is to extract the relevant data and place it in a struct called `CommitData` to get the following information:
-
-1. Number of commits per author (identified by the GitHub login).
-
-2. The number of commits per author.
+In this exercise, you will be provided with a json file `commits.json` with data corresponding to git commits in GitHub (extracted using the GitHub rest API). Your objective is to extract the relevant data and place it in a struct called `CommitData`.
 
 Create two functions:
-
-- `commits_per_author`: which returns a hash map with the number of commits per author.
-
+- `commits_per_author`: which returns a hash map with the number of commits per author. The auditors will be identified by their GitHub login.
 - `commits_per_date`: which returns a hash map with the number of commits per week.
 
-  - Note: A week is represented by the a year followed by the number of the
-    week. For example, January 1, 2020 is in week 1 of 2020 and will be
-    represented by a String with the form "2020-W1".
-
-### Notions:
-
-- [chrono](https://docs.rs/chrono/0.4.19/chrono)
-- [json](https://docs.rs/json/0.12.4/json/index.html)
+> A week is represented by the a year followed by the number of the week. For example, January 1, 2020 is in week 1 of 2020 and will be represented by a `String` with the form `"2020-W1"`.
 
 ### Expected functions
 
@@ -56,3 +43,8 @@ $ cargo run
 {"homembaixinho": 2, "mwenzkowski": 3, ... ,"tamirzb": 1, "paul-ri": 2, "RPigott": 1}
 $
 ```
+
+### Notions:
+
+- [chrono](https://docs.rs/chrono/0.4.19/chrono)
+- [json](https://docs.rs/json/0.12.4/json/index.html)