refactor: cleanup parser

src/elements/block.rs

@@ -13,19 +13,19 @@ pub fn parse(src: &str) -> Option<(&str, Option<&str>, usize, usize, usize)> {
     let name = memchr2(b' ', b'\n', src.as_bytes())
         .filter(|&i| src.as_bytes()[8..i].iter().all(u8::is_ascii_alphabetic))?;
     let mut lines = Lines::new(src);
-    let (pre_cont_end, cont_beg, _) = lines.next()?;
-    let args = if pre_cont_end == name {
+    let (pre_limit, begin, _) = lines.next()?;
+    let args = if pre_limit == name {
         None
     } else {
-        Some(&src[name..pre_cont_end])
+        Some(&src[name..pre_limit])
     };
     let name = &src[8..name];
     let end_line = format!(r"#+END_{}", name.to_uppercase());
-    let mut pre_end = cont_beg;
+    let mut pre_end = begin;
 
     for (_, end, line) in lines {
         if line.trim() == end_line {
-            return Some((name, args, cont_beg, pre_end, end));
+            return Some((name, args, begin, pre_end, end));
         } else {
             pre_end = end;
         }