Auto merge of #40338 - GuillaumeGomez:pulldown-switch, r=frewsxcv,steveklabnik

Replace hoedown with pull in rustdoc

cc @rust-lang/docs

diff --cc src/librustdoc/html/render.rs
Simple merge

diff --cc src/librustdoc/markdown.rs
index 5fadda030a4b41c5bc7798375ae6848694a3dbba,d29e98f8fe105bbefa67f4aecaaefbbfa5386d33..5cc0f03e1f629f4ff3021684d766a13640ebe15a
--- 1/src/librustdoc/markdown.rs
--- 2/src/librustdoc/markdown.rs
+++ b/src/librustdoc/markdown.rs
@@@ -25,10 -25,10 +25,10 @@@ use externalfiles::{ExternalHtml, LoadS
  use html::render::reset_ids;
  use html::escape::Escape;
  use html::markdown;
- use html::markdown::{Markdown, MarkdownWithToc, find_testable_code};
+ use html::markdown::{Markdown, MarkdownWithToc, MarkdownOutputStyle, find_testable_code};
  use test::{TestOptions, Collector};
  
 -/// Separate any lines at the start of the file that begin with `%`.
 +/// Separate any lines at the start of the file that begin with `# ` or `%`.
  fn extract_leading_metadata<'a>(s: &'a str) -> (Vec<&'a str>, &'a str) {
      let mut metadata = Vec::new();
      let mut count = 0;