[Rd] Typo in ?Memory

[Mikko Korpela]

I noticed a small typo in ?Memory. See the diff at the bottom of the
message.

- Mikko

Index: src/library/base/man/Memory.Rd
===================================================================
--- src/library/base/man/Memory.Rd	(revision 69448)
+++ src/library/base/man/Memory.Rd	(working copy)
@@ -31,7 +31,7 @@
   bytes on a 64-bit build.

   The default values are (currently) an initial setting of 350k cons
-  cell sand 6Mb of vector heap.  Note that the areas are not actually
+  cells and 6Mb of vector heap.  Note that the areas are not actually
   allocated initially: rather these values are the sizes for triggering
   garbage collection.  These values can be set by the command line
   options \option{--min-nsize} and \option{--min-vsize} (or if they are