[gnome-flashback] monitor-config-manager: only report Hz to 3 decimal places

[Alberts Muktupāvels <muktupavels src gnome org>]

commit fe3624938e52f3b3a86b7a808fa7bbcb1e150509
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Fri Aug 19 21:47:08 2022 +0300

    monitor-config-manager: only report Hz to 3 decimal places
    
    Based on mutter commit:
    https://gitlab.gnome.org/GNOME/mutter/-/commit/8e5f5fbe547ff632de1c15037a2d1a439ece8f12

 backends/gf-monitor-config-manager.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/backends/gf-monitor-config-manager.c b/backends/gf-monitor-config-manager.c
index 4dcc172..706f241 100644
--- a/backends/gf-monitor-config-manager.c
+++ b/backends/gf-monitor-config-manager.c
@@ -1184,7 +1184,7 @@ assign_monitor_crtcs (GfMonitorManager        *manager,
   if (!monitor_mode)
     {
       g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
-                   "Invalid mode %dx%d (%f) for monitor '%s %s'",
+                   "Invalid mode %dx%d (%.3f) for monitor '%s %s'",
                    monitor_mode_spec->width, monitor_mode_spec->height,
                    (gdouble) monitor_mode_spec->refresh_rate,
                    monitor_spec->vendor, monitor_spec->product);