fix scandelay option.

pym/cl_fill_install.py

@@ -739,7 +739,7 @@ class fillVars(object, glob_attr):
         """Kernel attributes"""
         # on usb-hdd install must be "delay=5"
         if self.Get('os_install_root_type') == 'usb-hdd':
-            return "scandelay=5"
+            return " scandelay=5"
         else:
             return ""