Fix is_ascii documentation and create contributor file
Proposed in
@@ -714,7 +714,7 @@ p The L2 norm of the token's vector representation.
+cell bool
+cell
| Does the token consist of ASCII characters? Equivalent to
- | #[code [any(ord(c) >= 128 for c in token.text)]].
+ | #[code all(ord(c) &lt; 128 for c in token.text)].
+row
+cell #[code is_digit]
