Ignore code blocks in tests.
//! to be executed when the module is first loaded. This function can have
//! any name but is conventionally called `main`:
//!
-//! ```
+//! ```ignore
//! # use neon::prelude::*;
//! #
//! # fn hello(mut cx: FunctionContext) -> JsResult<JsString> {
//! function via [`ModuleContext::export_function`](./context/struct.ModuleContext.html#method.export_function).
//! The `hello` function is defined just above `main` in `src/lib.rs`:
//!
-//! ```
+//! ```ignore
//! # use neon::prelude::*;
//! #
//! fn hello(mut cx: FunctionContext) -> JsResult<JsString> {
