余計な空行を削除

Author: shinmili

src/ch11-02-running-tests.md

@@ -221,7 +221,6 @@ our `add_two` function, as shown in Listing 11-11, and choose which ones to run.
 
 ```rust,noplayground
 {{#rustdoc_include ../listings/ch11-writing-automated-tests/listing-11-11/src/lib.rs}}
-
 ```
 
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