[Bug-apl] ⎕INP ignores parts of its input (Re: she bang script arguments)

[Kacper Gutowski]

I came up with this silly variant of APL-in-shell embedding:

  #!/bin/sh
  true ←⎕inp'#'
  exec apl --script "$0" -- ${1+"$@"} #
  )erase true

But I think there's something wrong with ⎕INP, actually.
In the example above, true is ⍬ (sic) just before erasing.

      ]BOXING 8
      ⎕INP "E"
AE
┌⊖┐
│0│
└─┘
      ⎕INP "E"
A
BE
┌→──┐
│┌⊖┐│
││ ││
│└─┘│
└∊──┘
      ⎕INP "E"
A
B
CE
┌→──────┐
│┌→┐ ┌→┐│
││A│ │B││
│└─┘ └─┘│
└∊──────┘

I was surprised that delimiter doesn't have to be at the beginning of
the line.  I don't know if that's intentional that everything before
it on that line is ignored, but the whole input gets ignored when
there is only a single line of it before the line containing the
delimiter, and that's certainly wrong.

-k