minor correction and first shot of disk configuration to base future works

doc/dev.md

@@ -738,7 +738,8 @@ The following global variables will be set at the end of the execution:
  - **```SYS_VER```** for the distribution version
  - **```SYS_CODE```** for the distribution codename
 
-The ```SYS_CODE``` variable won't be set if your distribution provides no codename.
+The ```SYS_CODE``` variable won't be set if your distribution provides no
+codename.
 
 ### 13.2. Other functionnalities
 That file don't provide any other thing that the previously listed functions.