Merge pull request #1870 from Hi-Angel/fix-cabal-uncomment

haskell-cabal: fix (comment-dwim) by correcting comment-start-skip

Author: purcell

Diff for: haskell-cabal.el

@@ -175,7 +175,7 @@ it from list if one of the following conditions are hold:
   (add-hook 'change-major-mode-hook 'haskell-cabal-unregister-buffer nil 'local)
   (add-hook 'kill-buffer-hook 'haskell-cabal-unregister-buffer nil 'local)
   (setq-local comment-start "-- ")
-  (setq-local comment-start-skip "\\(^[ \t]*\\)--[ \t]*")
+  (setq-local comment-start-skip "--[ \t]*")
   (setq-local comment-end "")
   (setq-local comment-end-skip "[ \t]*\\(\\s>\\|\n\\)")
   (setq-local indent-line-function 'haskell-cabal-indent-line)