Place compile-fail expected errors on their own line

test_suite/tests/compile-fail/borrow/bad_lifetimes.rs

@@ -9,9 +9,10 @@
 #[macro_use]
 extern crate serde_derive;
 
-#[derive(Deserialize)] //~ ERROR: 12:10: 12:21: failed to parse borrowed lifetimes: "zzz"
+#[derive(Deserialize)]
 struct Test<'a> {
     #[serde(borrow = "zzz")]
+    //~^^^ ERROR: failed to parse borrowed lifetimes: "zzz"
     s: &'a str,
 }
 

test_suite/tests/compile-fail/borrow/duplicate_lifetime.rs

@@ -9,9 +9,10 @@
 #[macro_use]
 extern crate serde_derive;
 
-#[derive(Deserialize)] //~ ERROR: 12:10: 12:21: duplicate borrowed lifetime `'a`
+#[derive(Deserialize)]
 struct Test<'a> {
     #[serde(borrow = "'a + 'a")]
+    //~^^^ ERROR: duplicate borrowed lifetime `'a`
     s: &'a str,
 }
 

test_suite/tests/compile-fail/borrow/duplicate_variant.rs

@@ -12,9 +12,10 @@ extern crate serde_derive;
 #[derive(Deserialize)]
 struct Str<'a>(&'a str);
 
-#[derive(Deserialize)] //~ ERROR: 15:10: 15:21: duplicate serde attribute `borrow`
+#[derive(Deserialize)]
 enum Test<'a> {
     #[serde(borrow)]
+    //~^^^ ERROR: duplicate serde attribute `borrow`
     S(#[serde(borrow)] Str<'a>)
 }
 

test_suite/tests/compile-fail/borrow/empty_lifetimes.rs

@@ -9,9 +9,10 @@
 #[macro_use]
 extern crate serde_derive;
 
-#[derive(Deserialize)] //~ ERROR: 12:10: 12:21: at least one lifetime must be borrowed
+#[derive(Deserialize)]
 struct Test<'a> {
     #[serde(borrow = "")]
+    //~^^^ ERROR: at least one lifetime must be borrowed
     s: &'a str,
 }
 

test_suite/tests/compile-fail/borrow/no_lifetimes.rs

@@ -9,9 +9,10 @@
 #[macro_use]
 extern crate serde_derive;
 
-#[derive(Deserialize)] //~ ERROR: 12:10: 12:21: field `s` has no lifetimes to borrow
+#[derive(Deserialize)]
 struct Test {
     #[serde(borrow)]
+    //~^^^ ERROR: field `s` has no lifetimes to borrow
     s: String,
 }
 

test_suite/tests/compile-fail/borrow/struct_variant.rs

@@ -12,9 +12,10 @@ extern crate serde_derive;
 #[derive(Deserialize)]
 struct Str<'a>(&'a str);
 
-#[derive(Deserialize)] //~ ERROR: 15:10: 15:21: #[serde(borrow)] may only be used on newtype variants
+#[derive(Deserialize)]
 enum Test<'a> {
     #[serde(borrow)]
+    //~^^^ ERROR: #[serde(borrow)] may only be used on newtype variants
     S { s: Str<'a> }
 }
 

test_suite/tests/compile-fail/borrow/wrong_lifetime.rs

@@ -9,9 +9,10 @@
 #[macro_use]
 extern crate serde_derive;
 
-#[derive(Deserialize)] //~ ERROR: 12:10: 12:21: field `s` does not have lifetime 'b
+#[derive(Deserialize)]
 struct Test<'a> {
     #[serde(borrow = "'b")]
+    //~^^^ ERROR: field `s` does not have lifetime 'b
     s: &'a str,
 }