pub fn page_h1_text(html: &str) -> Option<String>Expand description
Extract the collapsed text of the page’s primary <h1> heading.
rustdoc renders an item page heading as e.g. <h1>Struct serde_json::Value</h1>
(the item kind plus the fully-qualified path) and a crate landing page as
<h1>Crate serde</h1>. Returns the whitespace-collapsed text of the first
<h1> inside the main content area (falling back to any <h1>), or None
when the page has no heading.