Fix markdown issue, remove hard-coded rust-lang.org url

Author: willcrichton

src/doc/rustdoc/src/scraped-examples.md

@@ -2,14 +2,14 @@
 
 Rustdoc can automatically scrape examples of items being documented from the `examples/` directory of a Cargo workspace. These examples will be included within the generated documentation for that item. For example, if your library contains a public function:
 
-```rust,ignore(needs-other-file)
+```rust,ignore (needs-other-file)
 // a_crate/src/lib.rs
 pub fn a_func() {}
 ```
 
 And you have an example calling this function:
 
-```rust,ignore(needs-other-file)
+```rust,ignore (needs-other-file)
 // a_crate/examples/ex.rs
 fn main() {
   a_crate::a_func();

src/librustdoc/html/render/mod.rs

@@ -62,6 +62,7 @@ use rustc_span::{
 use serde::ser::SerializeSeq;
 use serde::{Serialize, Serializer};
 
+use crate::clean::utils::DOC_RUST_LANG_ORG_CHANNEL;
 use crate::clean::{self, ItemId, RenderedLink, SelfTy};
 use crate::error::Error;
 use crate::formats::cache::Cache;
@@ -2671,8 +2672,9 @@ fn render_call_locations(w: &mut Buffer, cx: &Context<'_>, item: &clean::Item) {
           <span></span>\
           <h5 id=\"{id}\">\
              <a href=\"#{id}\">Examples found in repository</a>\
-             <a class=\"scrape-help\" href=\"https://doc.rust-lang.org/rustdoc/scraped-examples.html\" target=\"_blank\">?</a>\
+             <a class=\"scrape-help\" href=\"{doc_prefix}/rustdoc/scraped-examples.html\" target=\"_blank\">?</a>\
           </h5>",
+        doc_prefix = DOC_RUST_LANG_ORG_CHANNEL,
         id = id
     );