[gnome-software] trivial: Use a colon in the --help output

[Richard Hughes <rhughes src gnome org>]

commit 773b345c9559fec845b9a3048eeb0dacfcd0f444
Author: Richard Hughes <richard hughsie com>
Date:   Fri Sep 13 09:39:16 2013 +0100

    trivial: Use a colon in the --help output

 src/gs-application.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-application.c b/src/gs-application.c
index 02398d4..6e21977 100644
--- a/src/gs-application.c
+++ b/src/gs-application.c
@@ -211,7 +211,7 @@ gs_application_command_line (GApplication        *application,
        const GOptionEntry options[] = {
                { "mode", '\0', 0, G_OPTION_ARG_STRING, &mode,
                  /* TRANSLATORS: this is a command line option */
-                 _("Start up mode, either ‘updates’, ‘updated’, ‘installed’ or ‘overview’"), _("MODE") },
+                 _("Start up mode: either ‘updates’, ‘updated’, ‘installed’ or ‘overview’"), _("MODE") },
                { "verbose", 'v', 0, G_OPTION_ARG_NONE, &verbose, NULL, NULL },
                { "help", '?', 0, G_OPTION_ARG_NONE, &help, NULL, NULL },