correctly copy the documentation directory
correctly copy the documentation directory

Earlier I had missed a comma while defining Grancher publish rake task.
Grancher would silently ignore it. Fixed it.

sferik/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,xml4r/libxml-ruby,xml4r/libxml-ruby,sferik/libxml-ruby,increments/libxml-ruby,sferik/libxml-ruby,sferik/libxml-ruby,increments/libxml-ruby,increments/libxml-ruby,xml4r/libxml-ruby