The ??c![@@diagram@@@@] <rows> ??c![] command is provided as an
alias for || <rows> || centered in math mode and
??c![] changes it to use || ... | syntax.
|v2| sets a special internal `old matrix' flag such that
trailing |
| are ignored and entries starting with |*| are safe.
( matrix )
( @@@diagram@@@@#1@@diagram@@@@@@@diagram@@@@@@#1
@@@diagram@@@@@ @##1##2@true ##1##2@##1##2@true /u.8ex/##1##2 =** -@ >?>*< <;?<*<;484>>
@
@@#1#23 @#3@diagram =** -@ >?>* <;?<*@;@@diagram@@@@@#1#2@Put \string around \begin...\end within diagrams
@@@diagram@@@@@@=@
@ )
??c![] is ignored because the matrix feature always outputs progress messages.
Finally the version 2 ??c![] and ??c![] spacing commands are emulated using || and ||:
( @#1@#1 @#1@#1 )
3