docs(devops): add info to readmes in the scripting piscine

subjects/devops/find-files-extension/README.md

@@ -29,24 +29,26 @@ $
 
 ### Hints
 
-`find` command is used to search and locate the list of files and directories based on conditions you specify for files that match the arguments:
-You can use REGEX in `find` command.
+The `find` command is used to search and locate the list of files and directories based on conditions you specify for files that match the arguments:
+
+You can use REGEX in the `find` command.
 
 ```console
-$find ~/ -iregex '<REGEX>'
+$ find ~/ -iregex '<REGEX>'
 <all files and folders in the user home that respect the specified regex>
 $
 ```
+
 REGEX for txt files: `.*\.\(txt\)`
 
-`cut` command is a command-line utility that allows you to cut out sections of a specified file or piped data and print the result:
+The `cut` command is a command-line utility that allows you to cut out sections of a specified file or piped data and print the result:
 
 ```console
-$cat cut-example.txt 
+$ cat cut-example.txt
 abc-lol
 testtest-abcx
 qwerty-azerty-x
-$cat cut-example.txt | cut -d "-" -f 1 # cut the lines with "-" as delimiter and print the first part.
+$ cat cut-example.txt | cut -d "-" -f 1 # cut the lines with "-" as delimiter and print the first part.
 abc
 testtest
 qwerty
@@ -56,4 +58,8 @@ $
 You may need to use pipes `(|)` and the logical operator `&&`.
 
 > You have to use Man or Google to know more about commands flags, in order to solve this exercice!
-> Google and Man will be your friends!
+> Google and Man will be your friends!
+
+### References
+
+[Regex](https://www.computerhope.com/jargon/r/regex.htm)

subjects/devops/master-the-ls/README.md

@@ -5,7 +5,7 @@
 Create a script `master-the-ls.sh`, that will do the following:
 
 - list the files and directories of the current directory.
-- Ignore the hidden files, the "." and the "..".
+- Ignore the hidden files, the current directory `.` and the parent directory `..`.
 - Separates the results with commas.
 - Order them by ascending order of access time (the newest first).
 - Have the directories ends with a `/`.