Rollup merge of #110765 - wackbyte:fix-defaultness-position, r=fmease,GuillaumeGomez

rustdoc: fix position of `default` in method rendering

With the following code:
```rs
#![feature(specialization)]

pub trait A {
    unsafe fn a();
}

impl A for () {
    default unsafe fn a() {}
}
```
rustdoc would render the `impl` of `a` as
```rs
unsafe default fn a()
```
which is inconsistent with the actual position of `default`.
This PR fixes this issue.

1 files changed, 31 insertions, 12 deletions

diff --git a/tests/rustdoc/default-trait-method.rs b/tests/rustdoc/default-trait-method.rs
index 6d0e339c48d..c8950678164 100644
--- a/tests/rustdoc/default-trait-method.rs
+++ b/tests/rustdoc/default-trait-method.rs
@@ -1,26 +1,45 @@
 #![feature(min_specialization)]
 
 // @has default_trait_method/trait.Item.html
-// @has - '//*[@id="tymethod.foo"]' 'fn foo()'
-// @!has - '//*[@id="tymethod.foo"]' 'default fn foo()'
-// @has - '//*[@id="tymethod.bar"]' 'fn bar()'
-// @!has - '//*[@id="tymethod.bar"]' 'default fn bar()'
-// @has - '//*[@id="method.baz"]' 'fn baz()'
-// @!has - '//*[@id="method.baz"]' 'default fn baz()'
 pub trait Item {
+    // @has - '//*[@id="tymethod.foo"]' 'fn foo()'
+    // @!has - '//*[@id="tymethod.foo"]' 'default fn foo()'
     fn foo();
+
+    // @has - '//*[@id="tymethod.bar"]' 'fn bar()'
+    // @!has - '//*[@id="tymethod.bar"]' 'default fn bar()'
     fn bar();
-    fn baz() {}
+
+    // @has - '//*[@id="tymethod.baz"]' 'unsafe fn baz()'
+    // @!has - '//*[@id="tymethod.baz"]' 'default unsafe fn baz()'
+    unsafe fn baz();
+
+    // @has - '//*[@id="tymethod.quux"]' 'unsafe fn quux()'
+    // @!has - '//*[@id="tymethod.quux"]' 'default unsafe fn quux()'
+    unsafe fn quux();
+
+    // @has - '//*[@id="method.xyzzy"]' 'fn xyzzy()'
+    // @!has - '//*[@id="method.xyzzy"]' 'default fn xyzzy()'
+    fn xyzzy() {}
 }
 
 // @has default_trait_method/struct.Foo.html
-// @has - '//*[@id="method.foo"]' 'default fn foo()'
-// @has - '//*[@id="method.bar"]' 'fn bar()'
-// @!has - '//*[@id="method.bar"]' 'default fn bar()'
-// @has - '//*[@id="method.baz"]' 'fn baz()'
-// @!has - '//*[@id="method.baz"]' 'default fn baz()'
 pub struct Foo;
 impl Item for Foo {
+    // @has - '//*[@id="method.foo"]' 'default fn foo()'
     default fn foo() {}
+
+    // @has - '//*[@id="method.bar"]' 'fn bar()'
+    // @!has - '//*[@id="method.bar"]' 'default fn bar()'
     fn bar() {}
+
+    // @has - '//*[@id="method.baz"]' 'default unsafe fn baz()'
+    default unsafe fn baz() {}
+
+    // @has - '//*[@id="method.quux"]' 'unsafe fn quux()'
+    // @!has - '//*[@id="method.quux"]' 'default unsafe fn quux()'
+    unsafe fn quux() {}
+
+    // @has - '//*[@id="method.xyzzy"]' 'fn xyzzy()'
+    // @!has - '//*[@id="method.xyzzy"]' 'default fn xyzzy()'
 }