-u
: Undefine FWEB macro (FTANGLE)
-uA
undefines the FWEB macro A
previously defined on the
command line (or in .fweb
) via -m
.
CAUTION: This option can also undefine built-in
functions such as $IF
. Don't do that, since built-ins can use other
built-ins behind the scenes; undefining one can cause very strange behavior.