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The closing delimiter in records and arrays is now correctly indented.

The final [end] in a signature or structure should now be correctly
indented. :-)

[IL.structure]. This makes the IL more reasonable and flexible. In
principle, the generated code is unchanged.

Fixed the printing of nonrecursive value definitions (use let/and instead
of let/let).

Updated the lexer accordingly.
This has the benefit that a type error in a trailer will be correctly located
in the .mly file. Until now, it wasn't.

A lot of cosmetic changes in order to avoid warnings (mostly unused variables).

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/menhir@330 0f8b5475-4b4e-0410-85a8-ee3154a6bfe7

git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/menhir@320 0f8b5475-4b4e-0410-85a8-ee3154a6bfe7