Add run-rustfix to inefficient_to_string

HMPerson1 · HMPerson1 · commit 0674d01bd2a5 · 2019-10-17T12:39:30.000-04:00
diff --git a/tests/ui/inefficient_to_string.rs b/tests/ui/inefficient_to_string.rs
@@ -1,3 +1,4 @@
+// run-rustfix
 #![deny(clippy::inefficient_to_string)]
 
 use std::borrow::Cow;

Original file line number	Diff line number	Diff line change
`@@ -1,3 +1,4 @@`
	`1`	`+// run-rustfix`
`1`	`2`	`#![deny(clippy::inefficient_to_string)]`
`2`	`3`
`3`	`4`	`use std::borrow::Cow;`