[rudycelekli]

Why

Typeset text writes negative numbers with the minus sign U+2212 (−), not the hyphen-minus -. Wikipedia's style requires it, and typeset PDFs and LaTeX output emit it. A model that copies a figure from such a passage into a number attribute writes "−3.2%". scan_quantity reads only [-+0-9.,_] as number characters, so the number part is empty and nothing parses.

normalize_attr_value and attribute_value both return None. The statement keeps no typed value, and a fall in revenue or margin never reaches the typed graph.

What changes

The number scan in scan_quantity also accepts − and reads it as - before parsing. Both readers, with and without a declared unit, go through this scan. No other character is added.

How it was checked

Three assertions in a_number_attribute_takes_a_written_quantity:

• normalize_attr_value("number", "−3.2%") is -3.2.
• normalize_attr_value("number", "−1,250") is -1250.
• attribute_value("number", Some("万元"), "−2.3亿元") is -23000.

Results:

• cargo test -p utopia-extract --lib: 111 passed.
• With the fix reverted, that test fails with left: None, right: Some(Number(-3.2)).
• cargo fmt --all --check and cargo clippy -p utopia-extract --all-targets -- -D warnings pass.

Before review

• Every commit is signed off (git commit -s)
• cargo fmt --all --check, cargo clippy and cargo test pass for the touched crate

[WaylandYang]

Thanks, merging. It overlaps #1423 in scan_quantity, so that one will need a rebase.