Auto merge of #25904 - benaryorg:master, r=steveklabnik

perhaps the smallest and least useful fix in the whole history of rust

I will not blame you if you do not want to merge it

Author: bors

src/libserialize/json.rs

@@ -145,7 +145,7 @@
 //!         val: num.to_json(),
 //!     }).unwrap();
 //!     println!("data: {}", data);
-//!     // data: {"uid":1,"dsc":"test","val":"0.0001+12.539j"};
+//!     // data: {"uid":1,"dsc":"test","val":"0.0001+12.539i"};
 //! }
 //! ```
 //!