lguest: documentation update

Went through the documentation doing typo and content fixes.  This
patch contains only comment and whitespace changes.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

diff --git a/drivers/lguest/core.c b/drivers/lguest/core.c
index 35d19ae..cb4c670 100644
--- a/drivers/lguest/core.c
+++ b/drivers/lguest/core.c
@@ -128,9 +128,12 @@
 		__free_pages(switcher_page[i], 0);
 }
 
-/*L:305
+/*H:032
  * Dealing With Guest Memory.
  *
+ * Before we go too much further into the Host, we need to grok the routines
+ * we use to deal with Guest memory.
+ *
  * When the Guest gives us (what it thinks is) a physical address, we can use
  * the normal copy_from_user() & copy_to_user() on the corresponding place in
  * the memory region allocated by the Launcher.