use pretty-compare-only in a test

Centril · Centril · commit 42ab82084063 · 2020-03-10T07:21:40.000+01:00
diff --git a/src/test/pretty/issue-12590-a.rs b/src/test/pretty/issue-12590-a.rs
@@ -1,4 +1,5 @@
 // pp-exact
+// pretty-compare-only
 
 // The next line should not be expanded
 

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,5 @@`
`1`	`1`	`// pp-exact`
	`2`	`+// pretty-compare-only`
`2`	`3`
`3`	`4`	`// The next line should not be expanded`
`4`	`5`