Compare value.

src/types/lesser_element.rs

@@ -12,6 +12,7 @@ pub struct Paragraph<'s> {
 #[derive(Debug)]
 pub struct Comment<'s> {
     pub source: &'s str,
+    pub value: Vec<&'s str>,
 }
 
 #[derive(Debug)]
@@ -209,3 +210,15 @@ impl<'s> StandardProperties<'s> for LatexEnvironment<'s> {
         self.source
     }
 }
+
+impl<'s> Comment<'s> {
+    pub fn get_value(&self) -> String {
+        let final_size = self.value.iter().map(|line| line.len()).sum();
+        let mut ret = String::with_capacity(final_size);
+        for line in &self.value {
+            ret.push_str(line);
+        }
+
+        ret
+    }
+}