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-rw-r--r--doc/intro.rst8
1 files changed, 4 insertions, 4 deletions
diff --git a/doc/intro.rst b/doc/intro.rst
index fc1269f9..9b93cb93 100644
--- a/doc/intro.rst
+++ b/doc/intro.rst
@@ -25,7 +25,7 @@ in mind:
The easier it is to write documentation, the more likely the
programmer is to do it. Haddock therefore uses lightweight markup in
its annotations, taking several ideas from
- `IDoc <http://www.cse.unsw.edu.au/~chak/haskell/idoc/>`__. In fact,
+ `IDoc <https://web.archive.org/web/20180621053227/http://www.cse.unsw.edu.au/~chak/haskell/idoc/>`__. In fact,
Haddock can understand IDoc-annotated source code.
- The documentation should not expose any of the structure of the
@@ -150,11 +150,11 @@ Acknowledgements
Several documentation systems provided the inspiration for Haddock, most
notably:
-- `IDoc <http://www.cse.unsw.edu.au/~chak/haskell/idoc/>`__
+- `IDoc <https://web.archive.org/web/20180621053227/http://www.cse.unsw.edu.au/~chak/haskell/idoc/>`__
-- `HDoc <http://www.fmi.uni-passau.de/~groessli/hdoc/>`__
+- `HDoc <https://mail.haskell.org/pipermail/haskelldoc/2001-April/000067.html>`__
-- `Doxygen <http://www.stack.nl/~dimitri/doxygen/>`__
+- `Doxygen <https://www.doxygen.nl/index.html>`__
and probably several others I've forgotten.