[gnome-calendar] application: Remove -d as short form of --debug

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 970cc1fca50dd8ea3938d21a4f3a85a9f1ba1d52
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Oct 3 20:19:40 2019 -0300

    application: Remove -d as short form of --debug
    
    Both --debug and --date had their short form -d, causing
    problems. Let's make -d stand for --date, since --debug
    is more of a development tool.
    
    https://gitlab.gnome.org/GNOME/gnome-calendar/issues/456

 src/gui/gcal-application.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/gui/gcal-application.c b/src/gui/gcal-application.c
index 6d493ed1..b9d46cec 100644
--- a/src/gui/gcal-application.c
+++ b/src/gui/gcal-application.c
@@ -68,7 +68,7 @@ static GOptionEntry gcal_application_goptions[] = {
     N_("Display version number"), NULL
   },
   {
-    "debug", 'd', 0,
+    "debug", 0, 0,
     G_OPTION_ARG_NONE, NULL,
     N_("Enable debug messages"), NULL
   },