[ruff] FURB164 Replace -nan with nan when using the value to construct Decimal (#20391)

## Summary

Fixes #19699

Normalize `Decimal(float("-nan"))` to `Decimal("nan")`.

The same handling is implemented in:

https://github.com/astral-sh/ruff/blob/c3e873dd827b9ec8dd49cff723089852ce2301e1/crates/ruff_linter/src/rules/refurb/rules/verbose_decimal_constructor.rs#L165

Author: TaKO8Ki

crates/ruff_linter/src/rules/refurb/rules/unnecessary_from_float.rs

@@ -293,7 +293,19 @@ fn handle_non_finite_float_special_case(
         return None;
     };
     let normalized = as_non_finite_float_string_literal(float_arg)?;
-    let replacement_text = format!(r#"{constructor_name}("{normalized}")"#);
+    let replacement_text = format!(
+        r#"{constructor_name}("{}")"#,
+        // `Decimal.from_float(float(" -nan")) == Decimal("nan")`
+        if normalized == "-nan" {
+            // Here we do not attempt to remove just the '-' character.
+            // It may have been encoded (e.g. as '\N{hyphen-minus}')
+            // in the original source slice, and the added complexity
+            // does not make sense for this edge case.
+            "nan"
+        } else {
+            normalized
+        }
+    );
     Some(Edit::range_replacement(replacement_text, call.range()))
 }
 

crates/ruff_linter/src/rules/refurb/snapshots/ruff_linter__rules__refurb__tests__FURB164_FURB164.py.snap

@@ -363,7 +363,7 @@ help: Replace with `Decimal` constructor
 21 | _ = Decimal.from_float(float("-Infinity"))
 22 | _ = Decimal.from_float(float("nan"))
    - _ = Decimal.from_float(float("-NaN "))
-23 + _ = Decimal("-nan")
+23 + _ = Decimal("nan")
 24 | _ = Decimal.from_float(float(" \n+nan   \t"))
 25 | _ = Decimal.from_float(float("  iNf \n\t "))
 26 | _ = Decimal.from_float(float("   -inF\n \t"))
@@ -655,7 +655,7 @@ help: Replace with `Decimal` constructor
 62 | 
 63 | # Cases with non-finite floats - should produce safe fixes
    - _ = Decimal.from_float(float("-nan"))
-64 + _ = Decimal("-nan")
+64 + _ = Decimal("nan")
 65 | _ = Decimal.from_float(float("\x2dnan"))
 66 | _ = Decimal.from_float(float("\N{HYPHEN-MINUS}nan"))
 
@@ -673,7 +673,7 @@ help: Replace with `Decimal` constructor
 63 | # Cases with non-finite floats - should produce safe fixes
 64 | _ = Decimal.from_float(float("-nan"))
    - _ = Decimal.from_float(float("\x2dnan"))
-65 + _ = Decimal("-nan")
+65 + _ = Decimal("nan")
 66 | _ = Decimal.from_float(float("\N{HYPHEN-MINUS}nan"))
 
 FURB164 [*] Verbose method `from_float` in `Decimal` construction
@@ -689,4 +689,4 @@ help: Replace with `Decimal` constructor
 64 | _ = Decimal.from_float(float("-nan"))
 65 | _ = Decimal.from_float(float("\x2dnan"))
    - _ = Decimal.from_float(float("\N{HYPHEN-MINUS}nan"))
-66 + _ = Decimal("-nan")
+66 + _ = Decimal("nan")