Description of problem:
 the description of the yum-basearchonly plugin has some typos (x68_64  and x86_46 used instead of x86_64)

Version-Release number of selected component (if applicable):
all versions of yum up to and including 1.1.16-13

How reproducible:

Steps to Reproduce:
  #yum info yum-basearchonly|grep Description -A5
  
Actual results:
 Description: this plugin makes Yum only install basearch packages on multiarch
           : systems. If you type 'yum install foo' on a x68_64 system, only
           : 'foo-x.y.x86_46.rpm' is installed. If you want to install the
           : foo-x.y.i386.rpm, you have to type 'yum install foo.i386'. The
           : plugin only works with 'yum install'.

Expected results:
  x68_64 system => x86_64
  foo-x.y.x86_46.rpm=> foo-x.y.x86_64.rpm