Description of problem:
The description of yum says that "command is one of" and lists (among other 
things):

clean [ packages | headers | metadata | cache | dbcache | all ]

but the Clean Options section does not list "cache".
The actual yum command responds to "yum clean cache" with
"Error: invalid clean argument: 'cache'"

Version-Release number of selected component (if applicable):
yum-3.2.1-1.fc7

How reproducible:
100%


Steps to Reproduce:
1. Issue "yum clean cache", receive the error message.
2. Issue "man yum", read the top sections of the man page.
3. Observe that top part of man page claims "yum clean cache" is valid.
  
Actual results:
man page says "yum clean cache" is valid, but it really isn't.

Expected results:
man page matches code.

Additional info: