fix docs

Author: brettmc

phper-doc/doc/_06_module/_02_register_functions/index.md

@@ -86,8 +86,10 @@ the `count` parameter is no longer long, but a reference.
 Arguments can have type-hints, nullability and default values applied. Here we define a function that accepts
 a nullable class (in this case, an interface), and a string with a default value:
 
-```rust,no-run
+```rust,no_run
 use phper::{modules::Module, php_get_module, functions::Argument, echo};
+use phper::types::ArgumentTypeHint;
+use std::ffi::CString;
 
 #[php_get_module]
 pub fn get_module() -> Module {

phper-doc/doc/_06_module/_06_register_class/index.md

@@ -106,10 +106,10 @@ foo.add_static_method(
 
 Methods may add argument and return typehints as per functions. For example:
 
-```rust,no-run
+```rust,no_run
 use phper::classes::{ClassEntity, ClassEntry, Visibility};
-use phper::functions::Argument;
-use phper::types::{ArgumentTypeHint, ReturnTypeHint},
+use phper::functions::{Argument, ReturnType};
+use phper::types::{ArgumentTypeHint, ReturnTypeHint};
 
 let mut foo = ClassEntity::new("Foo");
 foo.add_method(
@@ -120,7 +120,7 @@ foo.add_method(
     },
 )
 .argument(Argument::by_val("a_string").with_type_hint(ArgumentTypeHint::String))
-.argument(Argument::by_val("an_interface").with_type_hint(ArgumentTypeHint::ClassEntry(String::from(r"\MyNamespace\MyInterface")))))
+.argument(Argument::by_val("an_interface").with_type_hint(ArgumentTypeHint::ClassEntry(String::from(r"\MyNamespace\MyInterface"))))
 .return_type(ReturnType::by_val(ReturnTypeHint::Bool).allow_null());
 ```