Comment 2 for bug 1674667

The following shows up when running gnome-maps:

(gnome-maps:20317): Gtk-WARNING **: Theme parsing error: application.css:14:30: The style property GtkButton:image-spacing is deprecated and shouldn't be used anymore. It will be removed in a future version

From gtk+ documentation:

/**
  * GtkButton::image-spacing:
  *
  * Spacing in pixels between the image and label.
  *
  * Since: 2.10
  *
  * Deprecated: 3.20: Use CSS margins and padding instead.
  */