small documentation fixes

Signed-off-by: NAdrian Bunk <bunk@kernel.org>

arch/i386/Kconfig

@@ -392,7 +392,7 @@ config X86_MCE_NONFATAL
 	  will look at the machine check registers to see if anything happened.
 	  Non-fatal problems automatically get corrected (but still logged).
 	  Disable this if you don't want to see these messages.
-	  Seeing the messages this option prints out may be indicative of dying hardware,
+	  Seeing the messages this option prints out may be indicative of dying
 	  or out-of-spec (ie, overclocked) hardware.
 	  This option only does something on certain CPUs.
 	  (AMD Athlon/Duron and Intel Pentium 4)
@@ -631,7 +631,7 @@ config NUMA
 	default n if X86_PC
 	default y if (X86_NUMAQ || X86_SUMMIT)
 	help
-	  NUMA support for i386. This is currently high experimental
+	  NUMA support for i386. This is currently highly experimental
 	  and should be only used for kernel development. It might also
 	  cause boot failures.
 

mm/Kconfig

@@ -37,7 +37,7 @@ config DISCONTIGMEM_MANUAL
 	  in their physical address spaces, and this option provides
 	  more efficient handling of these holes.  However, the vast
 	  majority of hardware has quite flat address spaces, and
-	  can have degraded performance from extra overhead that
+	  can have degraded performance from the extra overhead that
 	  this option imposes.
 
 	  Many NUMA configurations will have this as the only option.