example usage of hg copy

[Aneesh Kumar K.V]

Hi,

Can somebody point me to the usage of hg copy with an example. Can i use 
  it to rename a file ? If so how ?

i did

mv a.c d.c
hg copy a.c d.c

and after i was trying hg log d.c . I was expecting it will show me the 
history of a.c also with rename as one entry.

-aneesh