Format settings.conf to make it easy to comment out a module.

settings.conf

@@ -11,5 +11,12 @@ modules-search:			[ local, /path/to/dir/with/more/modules ]
 # TBD: do we want to allow non-page modules (core-modules) to be set as immediate or
 # delayed? Is this an intrinsic property of a module? Does it depend on whether it's
 # a QProcess, a Python script or a plugin? More research is required. --teo
-modules-prepare : 		[ greeting, locale, keyboard, partition ]
-modules-postinstall : 	[ finished ]
+modules-prepare :
+- greeting
+- locale
+- keyboard
+- partition
+- summary
+
+modules-postinstall :
+- finished