# transform () grouping into space grouping (of multi-character mappings)
: paren
s,\(	.*\))(,\1 ,
/)(/ b paren
s,	(,	,
s,)$,,

: grouped

# convert escaped notations and escape special characters
s,",\\",g
s,\\040, ,g
s,\\043,#,g
s,\\134,\\\\,g