Print arrays and maps with to_debug.

doc/src/language/values-and-types.md

@@ -38,3 +38,5 @@ is an alias to `Rc<String>` or `Arc<String>` (depending on the [`sync`] feature)
 Any modification done to a Rhai string will cause the string to be cloned and the modifications made to the copy.
 
 The `to_string` function converts a standard type into a [string] for display purposes.
+
+The `to_debug` function converts a standard type into a [string] in debug format.

doc/src/patterns/enums.md

@@ -61,7 +61,7 @@ mod MyEnumModule {
         }
     }
     // Printing
-    #[rhai(global, name = "to_string", name = "print", name = "debug")]
+    #[rhai(global, name = "to_string", name = "print", name = "to_debug", name = "debug")]
     pub fn to_string(a: &mut MyEnum) -> String {
         format!("{:?}", a))
     }

doc/src/rust/print-custom.md

@@ -11,6 +11,7 @@ is `T: Display + Debug`):
 | ----------- | ---------------------------------------------- | ---------------------------- | -------------------------------------------------------------------- |
 | `to_string` | <code>\|x: &mut T\| -> String</code>           | `x.to_string()`              | converts the custom type into a [string]                             |
 | `print`     | <code>\|x: &mut T\| -> String</code>           | `x.to_string()`              | converts the custom type into a [string] for the [`print`] statement |
+| `to_debug`  | <code>\|x: &mut T\| -> String</code>           | `format!("{:?}", x)`         | converts the custom type into a [string] in debug format             |
 | `debug`     | <code>\|x: &mut T\| -> String</code>           | `format!("{:?}", x)`         | converts the custom type into a [string] for the [`debug`] statement |
 | `+`         | <code>\|s: &str, x: T\| -> String</code>       | `format!("{}{}", s, x)`      | concatenates the custom type with another [string]                   |
 | `+`         | <code>\|x: &mut T, s: &str\| -> String</code>  | `x.to_string().push_str(s);` | concatenates another [string] with the custom type                   |