Data.Position: add adjustPos, fix documentation
Data.Position: add adjustPos, fix documentation

Ignore-this: 4fa481b37e55b54aa2090be768a6e2ee

darcs-hash:20090126094425-c1f02-59bdbcf025ac5fe65723e0b2b3f4f91a5f1647fc.gz

jthornber/language-c-ejt,jthornber/language-c-ejt,jthornber/language-c-ejt