rustdoc: update tests for enum variant margin tweak

Author: notriddle

src/test/rustdoc-gui/enum-variants.goml

@@ -0,0 +1,5 @@
+// Verifies that there is non-zero margin on variants and their docblocks.
+goto: "file://" + |DOC_PATH| + "/test_docs/enum.WhoLetTheDogOut.html"
+
+assert-css: (".variants > .variant", {"margin": "0px 0px 12px"})
+assert-css: (".variants > .docblock", {"margin": "0px 0px 32px 24px"})

src/test/rustdoc/issue-88600.rs

@@ -8,22 +8,22 @@ pub struct S;
 
 // @has issue_88600/enum.FooEnum.html
 pub enum FooEnum {
-    // @has - '//*[@id="variant.HiddenTupleItem"]//code' 'HiddenTupleItem(_)'
+    // @has - '//*[@id="variant.HiddenTupleItem"]//h3' 'HiddenTupleItem(_)'
     // @count - '//*[@id="variant.HiddenTupleItem.field.0"]' 0
     HiddenTupleItem(#[doc(hidden)] H),
-    // @has - '//*[@id="variant.MultipleHidden"]//code' 'MultipleHidden(_, _)'
+    // @has - '//*[@id="variant.MultipleHidden"]//h3' 'MultipleHidden(_, _)'
     // @count - '//*[@id="variant.MultipleHidden.field.0"]' 0
     // @count - '//*[@id="variant.MultipleHidden.field.1"]' 0
     MultipleHidden(#[doc(hidden)] H, #[doc(hidden)] H),
-    // @has - '//*[@id="variant.MixedHiddenFirst"]//code' 'MixedHiddenFirst(_, S)'
+    // @has - '//*[@id="variant.MixedHiddenFirst"]//h3' 'MixedHiddenFirst(_, S)'
     // @count - '//*[@id="variant.MixedHiddenFirst.field.0"]' 0
     // @has - '//*[@id="variant.MixedHiddenFirst.field.1"]' '1: S'
     MixedHiddenFirst(#[doc(hidden)] H, /** dox */ S),
-    // @has - '//*[@id="variant.MixedHiddenLast"]//code' 'MixedHiddenLast(S, _)'
+    // @has - '//*[@id="variant.MixedHiddenLast"]//h3' 'MixedHiddenLast(S, _)'
     // @has - '//*[@id="variant.MixedHiddenLast.field.0"]' '0: S'
     // @count - '//*[@id="variant.MixedHiddenLast.field.1"]' 0
     MixedHiddenLast(/** dox */ S, #[doc(hidden)] H),
-    // @has - '//*[@id="variant.HiddenStruct"]//code' 'HiddenStruct'
+    // @has - '//*[@id="variant.HiddenStruct"]//h3' 'HiddenStruct'
     // @count - '//*[@id="variant.HiddenStruct.field.h"]' 0
     // @has - '//*[@id="variant.HiddenStruct.field.s"]' 's: S'
     HiddenStruct {