matcher: quasi match incorrectly treats nil as bound.

* share/txr/stdlib/match.tl (expand-quasi-match): bound-p
local function must return nil if the symbol is nil.

* share/txr/stdlib/match.tl: New test cases testing that @nil
is treated as an unbound variable in the
non-consecutive-variables test. Also, making duplicates of
certain tests that start with a text match and sticking @nil
as the first element into them, so that the text match is
forced to be the second item.

0 files changed, 0 insertions, 0 deletions