Updated runtime an documentation files.
diff --git a/README_extra.txt b/README_extra.txt
index 7347add..b1b02a5 100644
--- a/README_extra.txt
+++ b/README_extra.txt
@@ -7,7 +7,7 @@
 archive (vim-7.2-rt.tar.gz).  To be able to run Vim you MUST get the runtime
 archive too!
 
-The extra archive plus the source and runtime achives make up the complete
+The extra archive plus the source and runtime archives make up the complete
 sources of Vim for all systems.