Update bash-extracting_from_files.md

docs/pages/bash/bash-extracting_from_files.md

@@ -54,15 +54,19 @@ Using commands `head` and `tail` allows to do this tasks.
     grep ";2021;" nat2021.csv
     ```
 
-!!! question "How many names have been provided in 2021?"
+!!! question "How many names have been given in 2021?"
 
 ??? example "Click to show the solution"  
     ```bash
     grep ";2021;" nat2021.csv | wc -l
+    grep -c ";2021;" nat2021.csv
     # result: 13501
     ```
 
-!!! question "Is there more diversity in male or female names in 2021"?
+
+## Combining commands (| && ;)
+
+!!! question "Is there more diversity in male or female names in 2021?"
 
 ??? example "Click to show the solution"  
     ```bash
@@ -74,7 +78,7 @@ Using commands `head` and `tail` allows to do this tasks.
     # result: 6389
     ```
 
-!!! question "How many person are called PARIS in 2021"?
+!!! question "How many person are called PARIS in 2021?"
 
 ??? example "Click to show the solution"  
     ```bash
@@ -188,9 +192,6 @@ You can redirect a result and store it in a file thanks to the `>` redirection:
 
 
 
-## Combining commands (| && ;)
-
-