"tool" command was changed to be overridden by a Tcl command. Due
to macro clients being registered with the tool name instead of
just "layout", the "macro" command with no arguments or with a
window client argument was just broken. In the process of fixing
this, I realized that there was a conflict between the use of
"netlist" as a window name and also as the name of a tool, so I
changed the tool name to "nettool", a change which should be
transparent to the end user. Otherwise, "macro netlist" returns
the key bindings for the window, and the only way to get the key
bindings for the tool is to make the tool active and then use
"macro" without arguments. One remaining issue is that there is
no syntax error that will cause the list of valid windows and
tools to be printed. Probably "macro help" should print usage
information instead of acting like "macro" with no arguments.