Update ui test files

test_suite/tests/ui/identifier/both.stderr

@@ -1,11 +1,11 @@
 error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set
- --> $DIR/both.rs:4:9
+ --> $DIR/tests/ui/identifier/both.rs:4:9
   |
 4 | #[serde(field_identifier, variant_identifier)]
   |         ^^^^^^^^^^^^^^^^
 
 error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set
- --> $DIR/both.rs:4:27
+ --> $DIR/tests/ui/identifier/both.rs:4:27
   |
 4 | #[serde(field_identifier, variant_identifier)]
   |                           ^^^^^^^^^^^^^^^^^^

test_suite/tests/ui/identifier/field_struct.stderr

@@ -1,5 +1,5 @@
 error: #[serde(field_identifier)] can only be used on an enum
- --> $DIR/field_struct.rs:5:1
+ --> $DIR/tests/ui/identifier/field_struct.rs:5:1
   |
 5 | struct S;
   | ^^^^^^

test_suite/tests/ui/identifier/field_tuple.stderr

@@ -1,5 +1,5 @@
 error: #[serde(field_identifier)] may only contain unit variants
- --> $DIR/field_tuple.rs:7:5
+ --> $DIR/tests/ui/identifier/field_tuple.rs:7:5
   |
 7 |     B(u8, u8),
   |     ^^^^^^^^^

test_suite/tests/ui/identifier/newtype_not_last.stderr

@@ -1,5 +1,5 @@
 error: `Other` must be the last variant
- --> $DIR/newtype_not_last.rs:7:5
+ --> $DIR/tests/ui/identifier/newtype_not_last.rs:7:5
   |
 7 |     Other(String),
   |     ^^^^^^^^^^^^^

test_suite/tests/ui/identifier/not_unit.stderr

@@ -1,5 +1,5 @@
 error: #[serde(other)] must be on a unit variant
- --> $DIR/not_unit.rs:7:5
+ --> $DIR/tests/ui/identifier/not_unit.rs:7:5
   |
 7 | /     #[serde(other)]
 8 | |     Other(u8, u8),

test_suite/tests/ui/identifier/other_not_last.stderr

@@ -1,5 +1,5 @@
 error: #[serde(other)] must be on the last variant
- --> $DIR/other_not_last.rs:7:5
+ --> $DIR/tests/ui/identifier/other_not_last.rs:7:5
   |
 7 | /     #[serde(other)]
 8 | |     Other,

test_suite/tests/ui/identifier/other_untagged.stderr

@@ -1,5 +1,5 @@
 error: #[serde(other)] cannot appear on untagged enum
- --> $DIR/other_untagged.rs:6:5
+ --> $DIR/tests/ui/identifier/other_untagged.rs:6:5
   |
 6 | /     #[serde(other)]
 7 | |     Other,

test_suite/tests/ui/identifier/other_variant.stderr

@@ -1,5 +1,5 @@
 error: #[serde(other)] may not be used on a variant identifier
- --> $DIR/other_variant.rs:6:5
+ --> $DIR/tests/ui/identifier/other_variant.rs:6:5
   |
 6 | /     #[serde(other)]
 7 | |     Other,

test_suite/tests/ui/identifier/variant_struct.stderr

@@ -1,5 +1,5 @@
 error: #[serde(variant_identifier)] can only be used on an enum
- --> $DIR/variant_struct.rs:5:1
+ --> $DIR/tests/ui/identifier/variant_struct.rs:5:1
   |
 5 | struct S;
   | ^^^^^^

test_suite/tests/ui/identifier/variant_tuple.stderr

@@ -1,5 +1,5 @@
 error: #[serde(variant_identifier)] may only contain unit variants
- --> $DIR/variant_tuple.rs:7:5
+ --> $DIR/tests/ui/identifier/variant_tuple.rs:7:5
   |
 7 |     B(u8, u8),
   |     ^^^^^^^^^