[gnome-tetravex] Improve a translators comment.

[Arnaud B. <arnaudb src gnome org>]

commit c456aae618d249e72c25b8fdfc5fe81136338015
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sun Nov 24 21:15:32 2019 +0100

    Improve a translators comment.

 src/gnome-tetravex-cli.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gnome-tetravex-cli.vala b/src/gnome-tetravex-cli.vala
index dcc0ded..044e667 100644
--- a/src/gnome-tetravex-cli.vala
+++ b/src/gnome-tetravex-cli.vala
@@ -20,7 +20,7 @@
 
 private class TetravexCli : GLib.Application
 {
-    /* Translators: command-line help message, seen when running `gnome-tetravex-cli help`; introduces an 
explaination of what will happen when no command is given; would be similar to “(no command)” or “(empty)”, 
for example */
+    /* Translators: command-line help message, seen when running `gnome-tetravex-cli help`; introduces an 
explaination of what will happen when no command is given; nothing is NOT a keyword here, just go translate 
it; it would be similar to “(no command)” or “(empty)”, for example */
     private string nothing_text = _("(nothing)");
     private string help_text;