When using 2⎕tf to encode a nested array in which the last element is a
character array of rank greater than one, the parentheses around the
denotation of that element are incorrectly omitted.
zzzz←'elan' 77 (2 3⍴⍳2)
2⎕tf 'zzzz'
zzzz←'elan' 77 (2 3⍴1 2 1 2 1 2)
zzzz←'elan' 77 (2 3⍴⍬)
2⎕tf 'zzzz'
zzzz←'elan' 77 (2 3⍴0 0 0 0 0 0)
zzzz←'elan' 77 (2 3⍴'ab')
2⎕tf 'zzzz'
zzzz←'elan' 77 2 3⍴'ababab'
zzzz←'elan' 77 (2 3⍴'')
2⎕tf 'zzzz'
zzzz←'elan' 77 2 3⍴' '
The problem doesn't exist when the rank of the final element is less
than two, since no parentheses are necessary to delimit the element's
denotation:
zzzz←'elan' 77 'abc'
2⎕tf 'zzzz'
zzzz←'elan' 77 'abc'
zzzz←'elan' 77 ''
2⎕tf 'zzzz'
zzzz←'elan' 77 ''
