Pull in RustPython parser (#6099)

crates/ruff_python_literal/src/char.rs

@@ -0,0 +1,15 @@
+use unic_ucd_category::GeneralCategory;
+
+/// According to python following categories aren't printable:
+/// * Cc (Other, Control)
+/// * Cf (Other, Format)
+/// * Cs (Other, Surrogate)
+/// * Co (Other, Private Use)
+/// * Cn (Other, Not Assigned)
+/// * Zl Separator, Line ('\u2028', LINE SEPARATOR)
+/// * Zp Separator, Paragraph ('\u2029', PARAGRAPH SEPARATOR)
+/// * Zs (Separator, Space) other than ASCII space('\x20').
+pub fn is_printable(c: char) -> bool {
+    let cat = GeneralCategory::of(c);
+    !(cat.is_other() || cat.is_separator())
+}