[glib] gtestutils: add missing dash in seed argument's --help documentation

[Matthias Clasen <matthiasc src gnome org>]

commit ebfbae534bee10a569384c509388f2ee25ef9e92
Author: Evan Nemerson <evan nemerson com>
Date:   Mon Jan 4 00:32:04 2016 -0800

    gtestutils: add missing dash in seed argument's --help documentation
    
    https://bugzilla.gnome.org/show_bug.cgi?id=760115

 glib/gtestutils.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/glib/gtestutils.c b/glib/gtestutils.c
index b272b19..67baada 100644
--- a/glib/gtestutils.c
+++ b/glib/gtestutils.c
@@ -1075,7 +1075,7 @@ parse_args (gint    *argc_p,
                   "  -m {undefined|no-undefined}    Execute tests according to mode\n"
                   "  -p TESTPATH                    Only start test cases matching TESTPATH\n"
                   "  -s TESTPATH                    Skip all tests matching TESTPATH\n"
-                  "  -seed=SEEDSTRING               Start tests with random seed SEEDSTRING\n"
+                  "  --seed=SEEDSTRING              Start tests with random seed SEEDSTRING\n"
                   "  --debug-log                    debug test logging output\n"
                   "  -q, --quiet                    Run tests quietly\n"
                   "  --verbose                      Run tests verbosely\n",