[gnome-software] Use Unicode quotation marks in a new string

[Piotr Drąg <piotrdrag src gnome org>]

commit 50e1da42287f9d3b74946f3ce4bfd7761211924b
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Dec 13 17:13:45 2016 +0100

    Use Unicode quotation marks in a new string
    
    I believe it should be double quotes, but use single
    to be consistent with other command line options.

 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 418e03c..2446ad0 100644
--- a/src/gs-application.c
+++ b/src/gs-application.c
@@ -111,7 +111,7 @@ gs_application_init (GsApplication *application)
                  _("Open a local package file"), _("FILENAME") },
                { "interaction", '\0', 0, G_OPTION_ARG_STRING, NULL,
                  _("The kind of interaction expected for this action: either "
-                   "'none', 'notify', or 'full'"), NULL },
+                   "‘none’, ‘notify’, or ‘full’"), NULL },
                { "verbose", '\0', 0, G_OPTION_ARG_NONE, NULL,
                  _("Show verbose debugging information"), NULL },
                { "profile", 0, 0, G_OPTION_ARG_NONE, NULL,