Auto merge of #86559 - Dylan-DPC:rollup-aixg3q5, r=Dylan-DPC

Rollup of 6 pull requests

Successful merges:

 - #86223 (Specify the kind of the item for E0121)
 - #86521 (Add comments around code where ordering is important due for panic-safety)
 - #86523 (Improvements to intra-doc link macro disambiguators)
 - #86542 (Line numbers aligned with content)
 - #86549 (Add destructuring example of E0508)
 - #86557 (Update books)

Failed merges:

 - #86548 (Fix crate filter search reset)

r? `@ghost`
`@rustbot` modify labels: rollup

Author: bors

compiler/rustc_error_codes/src/error_codes/E0508.md

@@ -39,3 +39,16 @@ fn main() {
     let _value = array[0].clone();
 }
 ```
+
+If you really want to move the value out, you can use a destructuring array
+pattern to move it:
+
+```
+struct NonCopy;
+
+fn main() {
+    let array = [NonCopy; 1];
+    // Destructuring the array
+    let [_value] = array;
+}
+```

compiler/rustc_hir/src/hir.rs

@@ -2815,6 +2815,27 @@ impl ItemKind<'_> {
             _ => return None,
         })
     }
+
+    pub fn descr(&self) -> &'static str {
+        match self {
+            ItemKind::ExternCrate(..) => "extern crate",
+            ItemKind::Use(..) => "`use` import",
+            ItemKind::Static(..) => "static item",
+            ItemKind::Const(..) => "constant item",
+            ItemKind::Fn(..) => "function",
+            ItemKind::Mod(..) => "module",
+            ItemKind::ForeignMod { .. } => "extern block",
+            ItemKind::GlobalAsm(..) => "global asm item",
+            ItemKind::TyAlias(..) => "type alias",
+            ItemKind::OpaqueTy(..) => "opaque type",
+            ItemKind::Enum(..) => "enum",
+            ItemKind::Struct(..) => "struct",
+            ItemKind::Union(..) => "union",
+            ItemKind::Trait(..) => "trait",
+            ItemKind::TraitAlias(..) => "trait alias",
+            ItemKind::Impl(..) => "implementation",
+        }
+    }
 }
 
 /// A reference from an trait to one of its associated items. This