Fix const-display.rs XPATH queries (#1)

* Fix `const-display.rs` XPATH queries

* Add `issue_76501.rs` test file

* Rename issue_76501.rs to issue-76501.rs

Author: slightlyoutofphase

src/test/rustdoc/const-display.rs

@@ -12,7 +12,7 @@
 #[rustc_const_unstable(feature="foo", issue = "none")]
 pub const unsafe fn foo() -> u32 { 42 }
 
-// @has 'foo/fn.foo2.html' '//pre' 'pub fn foo2() -> u32'
+// @has 'foo/fn.foo2.html' '//pre' 'pub const fn foo2() -> u32'
 #[unstable(feature = "humans", issue = "none")]
 pub const fn foo2() -> u32 { 42 }
 
@@ -21,7 +21,7 @@ pub const fn foo2() -> u32 { 42 }
 #[rustc_const_stable(feature = "rust1", since = "1.0.0")]
 pub const fn bar2() -> u32 { 42 }
 
-// @has 'foo/fn.foo2_gated.html' '//pre' 'pub unsafe fn foo2_gated() -> u32'
+// @has 'foo/fn.foo2_gated.html' '//pre' 'pub const unsafe fn foo2_gated() -> u32'
 #[unstable(feature = "foo2", issue = "none")]
 pub const unsafe fn foo2_gated() -> u32 { 42 }
 
@@ -30,7 +30,7 @@ pub const unsafe fn foo2_gated() -> u32 { 42 }
 #[rustc_const_stable(feature = "rust1", since = "1.0.0")]
 pub const unsafe fn bar2_gated() -> u32 { 42 }
 
-// @has 'foo/fn.bar_not_gated.html' '//pre' 'pub unsafe fn bar_not_gated() -> u32'
+// @has 'foo/fn.bar_not_gated.html' '//pre' 'pub const unsafe fn bar_not_gated() -> u32'
 pub const unsafe fn bar_not_gated() -> u32 { 42 }
 
 pub struct Foo;

src/test/rustdoc/issue-76501.rs

@@ -0,0 +1,18 @@
+#![feature(const_fn)]
+
+// @has 'issue_76501/fn.bloop.html' '//pre' 'pub const fn bloop() -> i32'
+/// A useless function that always returns 1.
+pub const fn bloop() -> i32 {
+    1
+}
+
+/// A struct.
+pub struct Struct {}
+
+impl Struct {
+    // @has 'issue_76501/struct.Struct.html' '//*[@class="method"]' 'pub const fn bloop() -> i32'
+    /// A useless function that always returns 1.
+    pub const fn bloop() -> i32 {
+        1
+    }
+}