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Old uses of `compose' (`(.)') can magically turn into qualified
names; e.g., `LiteralInt.leStringToInt'; add spaces.
Leading-underscore names (a Glasgow extension) don't work anymore,
even with `-fglasgow-exts'.
The `Prelude.lex' function doesn't grok Haskell comments any more
(a good simplification, but a change nonetheless).
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