Close unclosed code example in E0185

GuillaumeGomez · GuillaumeGomez · commit d211cd65507e · 2016-06-01T16:17:21.000+02:00
diff --git a/src/librustc_typeck/diagnostics.rs b/src/librustc_typeck/diagnostics.rs
@@ -2040,6 +2040,7 @@ impl Foo for Bar {
     // the trait
     fn foo(&self) {}
 }
+```
 "##,
 
 E0186: r##"
