Function heading2link 

pub fn heading2link(text: &str) -> String

Convert heading text to a GFM-style anchor string.

Does not deduplicate - see collect_heading_links for counter logic.

Examples

use mdrefcheck::parser::heading2link;

assert_eq!(heading2link("Hello World"), "hello-world");
assert_eq!(heading2link("This -- Is__A_Test!"), "this----is__a_test");
assert_eq!(heading2link("A heading with 💡 emoji!"), "a-heading-with--emoji");