tiny mod to License comments

Distribution/License.hs

@@ -50,12 +50,13 @@ module Distribution.License (
   ) where
 
 -- |This datatype indicates the license under which your package is
--- released.  It is also wise to add your license to each source file.
--- The 'AllRightsReserved' constructor is not actually a license, but
--- states that you are not giving anyone else a license to use or
--- distribute your work.  The comments below are general guidelines.
--- Please read the licenses themselves and consult a lawyer if you are
--- unsure of your rights to release the software.
+-- released.  It is also wise to add your license to each source file
+-- using the license-file field.  The 'AllRightsReserved' constructor
+-- is not actually a license, but states that you are not giving
+-- anyone else a license to use or distribute your work.  The comments
+-- below are general guidelines.  Please read the licenses themselves
+-- and consult a lawyer if you are unsure of your rights to release
+-- the software.
 
 data License = GPL  -- ^GNU Public License. Source code must accompany alterations.
              | LGPL -- ^Lesser GPL, Less restrictive than GPL, useful for libraries.