Add configuration option to disable the default hidelines feature for rust

Author: zgtm

src/config.rs

@@ -697,13 +697,24 @@ impl Default for Playground {
 }
 
 /// Configuration for tweaking how the HTML renderer handles code blocks.
-#[derive(Debug, Default, Clone, PartialEq, Serialize, Deserialize)]
+#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]
 pub struct Code {
+    /// Enable or disable the default line hiding with '#' for rust. Default: `true`.
+    pub default_hidelines: bool,
     /// A prefix string to hide lines per language (one or more chars).
     pub hidelines: HashMap<String, String>,
 }
 
+impl Default for Code {
+    fn default() -> Code {
+        Code {
+            default_hidelines: true,
+            hidelines: HashMap::<String, String>::default(),
+        }
+    }
+}
+
 /// Configuration of the search functionality of the HTML renderer.
 #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
 #[serde(default, rename_all = "kebab-case")]

src/renderer/html_handlebars/hbs_renderer.rs

@@ -956,7 +956,7 @@ fn hide_lines(html: &str, code_config: &Code) -> String {
             let classes = &caps[2];
             let code = &caps[3];
 
-            if classes.contains("language-rust") {
+            if classes.contains("language-rust") && code_config.default_hidelines {
                 format!(
                     "<code class=\"{}\">{}</code>",
                     classes,