[C2hs] darcs patch: Allow escape sequences in the file name part of #line ...

[Duncan Coutts]

Here's a simple patch, just to check that "darcs send" is gettin through
to the list.

I'm using:
darcs send --edit-description

The patch fixes things for non-english locales where cpp sometimes uses escape
sequences in filenames or 'virtual' file names like translations of
"<interactive>". Currently the c2hs lexer doesn't accept escape sequences.
This patch changes that.

Thu Apr  6 22:47:15 BST 2006  Duncan Coutts <duncan.coutts at worc.ox.ac.uk>
  * Allow escape sequences in the file name part of #line directives

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