Fix main lib.rs and README.md example (#284)

Small fixes to just ensure lib.rs and README.md are run via cargo readme.

src/lib.rs

@@ -25,11 +25,11 @@
 //! ```rust
 //! fn main() -> Result<(), ureq::Error> {
 //! # ureq::is_test(true);
-//!   let body: String = ureq::get("http://example.com")
-//!       .set("Example-Header", "header value")
-//!       .call()?
-//!       .into_string()?;
-//!   Ok(())
+//!     let body: String = ureq::get("http://example.com")
+//!         .set("Example-Header", "header value")
+//!         .call()?
+//!         .into_string()?;
+//!     Ok(())
 //! }
 //! ```
 //!
@@ -86,7 +86,7 @@
 //!
 //! ureq returns errors via `Result<T, ureq::Error>`. That includes I/O errors,
 //! protocol errors, and status code errors (when the server responded 4xx or
-//! 5xx).
+//! 5xx)
 //!
 //! ```rust
 //! use ureq::Error;

src/response.rs

@@ -11,9 +11,9 @@ use url::Url;
 use crate::error::{Error, ErrorKind::BadStatus};
 use crate::header::Header;
 use crate::pool::PoolReturnRead;
+use crate::stream;
 use crate::stream::{DeadlineStream, Stream};
 use crate::unit::Unit;
-use crate::stream;
 
 #[cfg(feature = "json")]
 use serde::de::DeserializeOwned;