Add target_blank to RenderOptions for links

src/html.rs

@@ -804,6 +804,9 @@ impl<'o> HtmlFormatter<'o> {
                 if entering {
                     self.output.write_all(b"<a")?;
                     self.render_sourcepos(node)?;
+                    if self.options.render.target_blank {
+                        self.output.write_all(b" target=\"_blank\"")?;
+                    }
                     self.output.write_all(b" href=\"")?;
                     let url = nl.url.as_bytes();
                     if self.options.render.unsafe_ || !dangerous_url(url) {

src/parser/mod.rs

@@ -555,6 +555,18 @@ pub struct RenderOptions {
     /// assert!(xml.contains("<emph sourcepos=\"1:7-1:13\">"));
     /// ```
     pub sourcepos: bool,
+
+    /// Make all links in the document open in a new tab by setting `target="_blank"`.
+    ///
+    /// ```rust
+    /// # use comrak::{markdown_to_html, Options};
+    /// let mut options = Options::default();
+    /// options.render.target_blank = true;
+    /// let input = "Hello [world](https://www.github.com)!";
+    /// let html = markdown_to_html(input, &options);
+    /// assert!(html.contains("target=\"_blank\""));
+    /// 
+    pub target_blank: bool,
 }
 
 #[non_exhaustive]

src/tests/propfuzz.rs

@@ -36,6 +36,7 @@ fn propfuzz_doesnt_crash(md: String) {
             escape: false,
             list_style: ListStyleType::Dash,
             sourcepos: true,
+            target_blank: false,
         },
     };