Merge pull request SamyPesse#40 from dharmatech/patch-1

Chapter-6/README.md: minor typo

Author: SamyPesse

Chapter-6/README.md

@@ -4,7 +4,7 @@ Thanks to GRUB, your kernel is no longer in real-mode, but already in [protected
 
 #### What is the GDT?
 
-The [GDT](http://en.wikipedia.org/wiki/Global_Descriptor_Table) ("Global Descriptor Table") is a data structure used to define the different memory area: the base address, the size and access privileges like execute and write. These memory areas are called "segments".
+The [GDT](http://en.wikipedia.org/wiki/Global_Descriptor_Table) ("Global Descriptor Table") is a data structure used to define the different memory areas: the base address, the size and access privileges like execute and write. These memory areas are called "segments".
 
 We are going to use the GDT to define different memory segments: