patch applied (cabal): unlit preserves comments for Haddock's benefit. More complex algorithm to handle cases where we want blank lines (containing whitespace) to become comment lines in the output.

Tue Dec 4 13:15:50 PST 2007 alistair@abayley.org * unlit preserves comments for Haddock's benefit. More complex algorithm to handle cases where we want blank lines (containing whitespace) to become comment lines in the output. M ./Distribution/Simple/PreProcess/Unlit.hs -59 +73