Reintroduce set_interpreter for Collect and op :.
I removed them by accident when removing old code that dealt with the "set" type.
Incidentally, there is still some broken "set" code in Refute that should be fixed (see TODO in refute.ML).
#! /bin/sh
#
#sedindex - shell script to create indexes, preprocessing LaTeX's .idx file
#
# puts strings prefixed by * into \tt font
# terminator characters for strings are |!@{}
#
# a space terminates the \tt part to allow \index{*notE theorem}, etc.
#
# note that makeindex uses a dboule quote (") to delimit special characters.
#
# change *"X"Y"Z"W to "X"Y"Z"W@{\tt "X"Y"Z"W}
# change *"X"Y"Z to "X"Y"Z@{\tt "X"Y"Z}
# change *"X"Y to "X"Y@{\tt "X"Y}
# change *"X to "X@{\tt "X}
# change *IDENT to IDENT@{\tt IDENT}
# where IDENT is any string not containing | ! or @
# FOUR backslashes: to escape the shell AND sed
sed -e "s~\*\(\".\".\".\".\)~\1@\\\\isa {\1}~g
s~\*\(\".\".\".\)~\1@\\\\isa {\1}~g
s~\*\(\".\".\)~\1@\\\\isa {\1}~g
s~\*\(\".\)~\1@\\\\isa {\1}~g
s~\*\([^ |!@{}][^ |!@{}]*\)~\1@\\\\isa {\1}~g" $1.idx | makeindex -c -q -o $1.ind