Fixed doctest

src/stl/mod.rs

@@ -11,3 +11,5 @@ mod str;
 
 pub use cpsio::{handle as handleIO, IO};
 pub use mk_stl::mk_stl;
+pub use self::bool::Boolean;
+pub use self::num::Numeric;

src/stl/num/numeric.rs

@@ -12,7 +12,9 @@ use crate::representations::{Literal, Primitive};
 /// A number, either floating point or unsigned int, visible to Orchid.
 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 pub enum Numeric {
+  /// A nonnegative integer such as a size, index or count
   Uint(u64),
+  /// A float other than NaN. Orchid has no silent errors
   Num(NotNan<f64>),
 }