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aup now emits Pure module v3 and adds text states with string initializers,
cursors bound to a text, text inputs, string literals with escapes and
{interpolation} of numbers and text, cursor distances in chars and lines,
.start/.end, insert/remove, name.line(cursor), .chars/.lines/.bytes on text,
.chars/.line on cursors, and text(bytes)/bytes(text). Replies and replace
accept text as its UTF-8 bytes. Views are numbers or text. Up to 32 inputs.
examples/notes.aup is a small editor. make check replays random typing
(ASCII, Korean, emoji, combining marks, NUL, newlines), moves and deletions
against a Python reference model: 4,800 snapshots of text, cursor, mark and
views match. It also checks escapes and number text, 16 new diagnostics, a
document loaded into text and saved back, and all earlier parity; the
compiler and the Pure executor each pass under ASan/UBSan.
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