improved doc

doc/dev.md

@@ -179,6 +179,10 @@ For example, if you what to write "ATTENTION: this is a warning!" in red with
 echo -e "${IRed}${On_IYellow}ATTENTION:${DEFAULTBG} this is a warning!${DEFAULTCOL}"
 ```
 
+Remember to always terminate an *echo -e* using colors with the $DEFAULTCOL
+variable. If not, any new line might be filled with the last used color and line
+ending will filled with background color.
+
 ## 4. The filefct.sh file
 ### 4.1. Functions
 #### 4.1.1. stdtime