[cvs-nhc98] patch applied (hat): Display AtomAbstract values e.g. IO as {IO} instead of _IO_.

Fri Jun 14 03:33:54 PDT 2002 malcolm * Display AtomAbstract values e.g. IO as {IO} instead of _IO_. Also, fix a display problem with cyclic lists where the terminating ] was missing. M ./src/hattools/SExp.hs -3 +7 M ./src/hattools/artutils.c -1 +1