if writing "gettext -s 'message'", msginit does not include the message in the POT file

[Didier Spaier]

Hello,

Using gettext-0.21, language: shell

this line:
gettext "this is a line"
gives in the pot file:
msgid "write:"

But this line:
gettext "this is a line"
only gives a line like
#: <source filename>:<line number>
instead

What do I miss?

I ask as I'd rather avoid, to append a <newline> to the message, to write 
instead :
gettext "this is a line"; echo

Cheers,
Didier