Strings terminated in end line

It is advisable to avoid the use of "\n" in strings, to facilitate human translation, if you want to print a string with line break at the end in the standard output, instead of using printf, you can use a new alternative function: printfln (defined in trad.h), and similarly sprintfln. For example, instead of writing:

printf(_("My message\n"));

it is better to use:

printfln(_("My message"));

In this way, a "cleaner" string will remain in the database and errors from the human translator will be avoided.