Copy correct path to clipboard for modules/keywords/primitives

Author: clubby789

src/librustdoc/html/static/js/main.js

@@ -1828,11 +1828,15 @@ href="https://doc.rust-lang.org/${channel}/rustdoc/read-documentation/search.htm
 return;
 }
 but.onclick=()=>{
-constpath=[];
-onEachLazy(document.querySelectorAll(".rustdoc-breadcrumbs a"),a=>{
-path.push(a.textContent);
-});
-path.push(document.querySelector("title").textContent.split(" ")[0]);
+// Most page titles are '<Item> in <path::to::module> - Rust', except
+// modules (which don't have the first part) and keywords/primitives
+// (which don't have a module path)
+consttitle=document.querySelector("title").textContent.replace(" - Rust","");
+const[item,module]=title.split(" in ");
+constpath=[item];
+if(module!==undefined){
+path.unshift(module);
+}
 
 copyContentToClipboard(path.join("::"));
 copyButtonAnimation(but);