[Chicken-hackers] [PATCH] Fix two "qualified symbol as keyword" mixups

[Peter Bex]

Hi all,

Mario found out that there's a weird bug in open-with-input-pipe:
$ csi -e '(begin (import (chicken process)) (open-input-pipe "ls"))'
Error: illegal input/output mode specifier: |###text|

This breaks Salmonella, and probably many other programs which use
pipes.

It turns out that here (and also in open-input-file*), keywords are
supposed to be accepted to control the file mode.  These are written
as qualified symbols with no namespace (###text and ###append), which
used to read the same as keywords.  This is more of an accident than
by design, as far as I can tell.

Attached is a simple patch to fix this.

I couldn't find any other places in core where we do something like this,
so hopefully this fixes it.

Cheers,
Peter

0001-Do-not-use-text-and-append-as-if-they-were-keywords.patch
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