[bug #42675] \} considered as macro argument regarding register .$

[Carsten Kunze]

Follow-up Comment #3, bug #42675 (project groff):

Although this bug seems to be in any existing *roff implementation, it should
be fixed.  At the moment the n(.$ register can't be used in a macro that may
be invoked by other users because it has a random value, which depends on if
the user writes

.A }

or

.A
.}

To make n(.$ meaningful again and make it fit it's documentation this bug
should be fixed.  This breaks "compatibility" with traditional *roff but only
in cases where the input relies on side effects of this bug.  Because of it's
random nature such cases are unlikely.

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