diff --git a/htdocs/custom/README.md b/htdocs/custom/README.md
index 3a486e5a4a8..cd44682154d 100644
--- a/htdocs/custom/README.md
+++ b/htdocs/custom/README.md
@@ -1,22 +1,23 @@
-# DOLIBARR ERP & CRM custom directory for external modules.
+# DOLIBARR ERP & CRM custom directory for external modules
 
 This directory is dedicated to store external modules.
 To use it, just copy here the directory of the module into this directory.
 
-Note: On linux or MAC systems, it is better to unzip/store the external module directory into 
+Note: On linux or MAC systems, it is better to unzip/store the external module directory into
 a different place than this directory and just adding a symbolic link here to the htdocs directory
 of the module.
 
-For example on Linux OS: Get the module from the command 
-mkdir ~/git; cd ~/git
-git clone https://git.framasoft.org/p/newmodule/newmodule.git
+For example on Linux OS: Get the module from the command
+`mkdir ~/git; cd ~/git`
+`git clone https://git.framasoft.org/p/newmodule/newmodule.git`
 Then create the symbolic link
-ln -fs ~/git/newmodule/htdocs /path_to_dolibarr/htdocs/custom/newmodule 
+`ln -fs ~/git/newmodule/htdocs /path_to_dolibarr/htdocs/custom/newmodule`
 
 WARNING !!!
-Check also that the /custom directory is active by adding into dolibarr conf/conf.php file the following 
+Check also that the /custom directory is active by adding into dolibarr `conf/conf.php` file the following
 two lines, so dolibarr will also scan /custom directory to find external external modules:
 
+```php
 $dolibarr_main_url_root_alt='/custom';
 $dolibarr_main_document_root_alt='/path_to_dolibarr/htdocs/custom/';
-
+```