feat(passive): improve subject

- implement some minor grammar fix suggested by the grammar checker
- improve formatting in the given example
- fix small inconsistency in the given example

subjects/cybersecurity/passive/README.md

@@ -20,13 +20,11 @@ https://en.wikipedia.org/wiki/Doxing
 
 You are going here to create your first passive recognition tool, you have the choice of language, however your program will have to recognize the information entered (FULL NAME, IP, @login).
 
-For the case of the full name, it will have to recognize the entry:
-Last name First Name,
-then look in the directories for the telephone number and the address.
+For the case of the full name, it will have to recognize the entry: "Last name" and "First name", and then look in the directories for the telephone number and the address.
 
-If it is the ip address, your tool should display at least the city and the name of the internet service provider.
+If it is the IP address, your tool should display at least the city and the name of the internet service provider.
 
-If it is an username, your tool will have to check if this username is used in at least 5 known social networks.
+If it is a username, your tool will have to check if this username is used in at least 5 known social networks.
 
 The result should be stored in a result.txt file (result2.txt if the file already exists)
 
@@ -46,20 +44,20 @@ OPTIONS:
     -ip         Search with ip address
     -u          Search with username
 
-$>  passive -fn "Jean Dupont"
-First name: John
-Name: Dupont
+$> passive -fn "Jean Dupont"
+First name: Jean
+Last name: Dupont
 Address: 7 rue du Progrès
 75016 Paris
 Number: +33601010101
 Saved in result.txt
 
-$>  passive -ip 127.0.0.1
+$> passive -ip 127.0.0.1
 ISP: FSociety, S.A.
 City Lat/Lon:	(13.731) / (-1.1373)
 Saved in result2.txt
 
-$>  passive -u "@user01"
+$> passive -u "@user01"
 Facebook : yes
 Twitter : yes
 Linkedin : yes
@@ -73,8 +71,8 @@ Saved in result3.txt
 Files that must be inside your repository:
 
 - Your program source code.
-- a README.md file, Which clearly explains how to use the program.
+- A README.md file, which clearly explains how to use the program.
 
-Don’t hesitate to double check the names of your folders and files to ensure they are correct!
+Don’t hesitate to double-check the names of your folders and files to ensure they are correct!
 
 > ⚠️ These methods and tools are for educational purposes only, so that you have a better understanding of how to protect against similar vulnerabilities. You must ensure that you do not attempt any exploit-type activity without the explicit permission of the owner of the machine, system or application. Failure to obtain permission risks breaking the law.