toggling a comment does not work in Haskell-Cabal mode

[FabArd]

When I want to uncomment a line in the Haskell-Cabal mode it doesn't work if the line starts with a space.

Exemple : if I want to uncomment the above line with C-x C-; -- other-modules: will result in -- -- other-modules:

It seems that uncommenting a line that starts with a space is impossible. No problem when the line do not start with space : toggling is correct.

[bernhard-herzog]

Is this still a problem? It seems to work fine for me in a current version haskell-mode.