Cleaned up description of the Matrix datatype.
Cleaned up description of the Matrix datatype.

darcs-hash:20070503171920-b99d0-11a9d7b6b60428b2f07b04b53c73dbee828c50a7.gz

thiagoarrais/gtk2hs,thiagoarrais/gtk2hs,thiagoarrais/gtk2hs